W. Imhof

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Quantitative analysis of PET microplastics in environmental model samples using quantitative 1H-NMR spectroscopy: validation of an optimized and consistent sample clean-up method

C. Fischer, C. Winkelmann, Nadine Peez, 2019, Analytical and Bioanalytical Chemistry.

A Novel [FeFe] Hydrogenase Model with a (SCH2)2P═O Moiety

H. Görls, W. Weigand, Manfred Rudolph, 2013 .

The synthesis of diethyl 2-(2,2$$'$$′-bipyridin-4-ylmethylene)malonate and diethyl 3,3$$'$$′-(2,2$$'$$′-bipyridine-4,4$$'$$′-diyl)diacrylate

H. Görls, W. Imhof, Katharina Heintz, 2018, Journal of Chemical Sciences.

The reaction of ortho-halogenated aromatic aldazine ligands with Fe2(CO)9: symmetrical cleavage of the azine and carbon–halogen activation

Daniel Doennecke, W. Imhof, Kathi Halbauer, 2004 .

The first application of quantitative 1H NMR spectroscopy as a simple and fast method of identification and quantification of microplastic particles (PE, PET, and PS)

Nadine Peez, W. Imhof, Marie-Christine Janiska, 2018, Analytical and Bioanalytical Chemistry.

2,2′-Bipyridin-1′-ium 1-oxide bromide monohydrate

W. Imhof, Katharina Heintz, H. Görls, 2018, Acta crystallographica. Section E, Crystallographic communications.

The formation of cis- and trans-[Ru(CN)2(CNtBu)4] by reductive cleavage of isocyanide ligands; isomer separation by supramolecular interactions with various solvents

Daniel Doennecke, W. Imhof, 2003 .

Electrochemical and Computational Insights into the Reduction of [Fe2(CO)6{µ-(SCH2)2GeMe2}] Hydrogenase H-Cluster Mimic

W. Weigand, W. Imhof, Laith R. Almazahreh, 2019, Inorganics.

Ligand effects on the electrochemical behavior of [Fe2(CO)5(L){μ-(SCH2)2(Ph)P=O}] (L = PPh3, P(OEt)3) hydrogenase model complexes.

H. Görls, W. Weigand, P. Schollhammer, 2015, Dalton transactions.

2,6-Diisopropylphenylamides of Potassium and Calcium: A Primary Amido Ligand in s-Block Metal Chemistry with an Unprecedented Catalytic Reactivity

Sven Krieck, M. Westerhausen, W. Imhof, 2013 .

Reaction of "non-symmetrical" 1,2,4-trithiolanes with [(phosphane)Pt(0)(η2-nbe)] complexes.

H. Görls, W. Weigand, G. Mlostoń, 2012, Chemistry, an Asian journal.

A comprehensive study of the effects of spectator ligands, transition metals and lithium halide additives on the efficiency of iron, nickel and palladium-catalyzed cross-coupling reactions of cyclohexyl magnesium bromide with fluorinated bromobenzenes

W. Imhof, A. Dahadha, 2013 .

Intramolecular electron transfer in cyanide bridged adducts comprising Ru(II)/Ru(III) tetracarboxylate and [Mn(I)(CO)(CN)((t)BuNC)(4)] units.

Sven Krieck, W. Plass, E. T. Spielberg, 2010, Dalton transactions.

Total synthesis and detection of the bilirubin oxidation product (Z)-2-(3-ethenyl-4-methyl-5-oxo-1,5-dihydro-2H-pyrrol-2-ylidene)ethanamide (Z-BOX A).

G. Pohnert, M. Reiher, M. Westerhausen, 2013, Organic letters.

Quantitative 1H-NMR spectroscopy as an efficient method for identification and quantification of PVC, ABS and PA microparticles.

Nadine Peez, W. Imhof, 2020, The Analyst.

Ionic liquids as solvents for a ruthenium-catalyzed C–H activation reaction: synthesis of heterocyclic compounds from α,β-unsaturated imines, carbon monoxide, and ethylene

A. Stark, W. Imhof, T. Biletzki, 2010 .

Transition metal catalyzed cycloaddition reactions of chiral ketimines with alkenes and carbon monoxide: reaction conditions, substrate variations and stereoselectivity

W. Imhof, A. Göbel, 2003 .

Diaryltriazenido Palladium(II) complexes derived from 1-(2-bromo-4-ethoxycarbonylphenyl)-3-phenyltriazenes

Sven Krieck, M. Westerhausen, W. Imhof, 2019, Journal of Organometallic Chemistry.

Microwave-assisted ruthenium catalysed high-pressure synthesis of N-heterocyclic compounds

W. Imhof, Niklas Feller, 2019, Monatshefte für Chemie - Chemical Monthly.

Size matters: biochemical mineralization and microbial incorporation of dicarboxylic acids in soil

S. Spielvogel, Hamed Kashi, M. Dippold, 2022, Biogeochemistry.

One-pot synthesis of γ-lactams in a reaction cascade from α,β-unsaturated imines, CO and ethylene catalysed by Ru3(CO)12†

D. Berger, W. Imhof, 1999 .

Mechanistical studies on C–H activation reactions of benzaldimines using selectively deuterated ligands: synthesis and crystal structures of [μ2-η3-(R)N–CH2–(H)]Fe2(CO)6

H. Fritzsche, J. Flemming, W. Imhof, 1999 .

Photochemical Synthesis of Ruthenium–Carbonyl Compounds with Thioether Ligands and Subsequent Oxidative Cleavage of Trinuclear Complexes by Chlorinated Solvents

B. Maiti, W. Imhof, H. Görls, 2011 .

A straightforward and generalizable synthetic methodology for the synthesis of ruthenium(II) complexes with thioether ligands from either Ru(III) or Ru(0) precursors.

B. Maiti, W. Imhof, H. Görls, 2010, Dalton transactions.

Di-μ-bromo-2κ 2 Br :2′κ 2 Br -bis[bis(μ-acetylacetonato-1κ O :2κ O ′)bromo-2κ Br -bis(tetrahydrofuran-1κ O )cadmium(II)nickel(II)]

Wolfgang Imhof, Manfred Döring, Gabriela Hahn, 2006 .

Bis{2-[(2,4,6-trimethylphenyl)iminomethyl]pyrrol-1-ido}palladium(II)

Wolfgang Imhof, W. Imhof, 2013, Acta crystallographica. Section E, Structure reports online.

Bis{2-[(phenylimino)methyl]-1H-pyrrol-1-ido}palladium(II)

Wolfgang Imhof, W. Imhof, 2012, Acta crystallographica. Section E, Structure reports online.

Di-μ-hydroxo-κ 4 O : O -bis[aquatris(triphenylsilanolato-κ O )zirconium(IV)] toluene solvate

Wolfgang Imhof, Dirk Walther, Bernd Schweder, 2006 .

C,H bond activation of imino substituted heterocycles: synthesis and crystal structure of and the isomeric clusters

W. Imhof, 1997 .

The mutual influence of the imine substituents of terephthal-bis-imines concerning their reactivity towards Fe2(CO)9

W. Imhof, A. Göbel, 2000 .

Regioselectivity in iron-catalyzed [2+2+1] cycloadditions: a DFT investigation of substituent effects in 1,4-diazabutadienes.

E. Anders, W. Imhof, 2004, Chemistry.

Microwave assisted synthesis of 3-(2,2′-bipyridine-4-yl)-2-propenoic acid ethyl ester

H. Görls, W. Imhof, Katharina Heintz, 2017, Monatshefte für Chemie - Chemical Monthly.

A theoretical study on the complete catalytic cycle of the hetero-Pauson-Khand-type [2+2+1] cycloaddition reaction of ketimines, carbon monoxide and ethylene catalyzed by iron carbonyl complexes.

E. Anders, W. Imhof, H. Görls, 2003, Chemistry.

Cleavage of thioether bridges in dinuclear ruthenium complexes by Lewis bases: Synthesis and crystal structure of [RuCl2(CO)(THT)(PPh3)2]

B. Maiti, W. Imhof, H. Görls, 2011 .

The ruthenium catalyzed formation of chiral dihydropyrrolones from α, β-unsaturated imines: extending the reaction to terminal alkenes and investigating the formation of pyrroles as side-products

Daniel Doennecke, W. Imhof, 2003 .

Synthesis of Trinuclear Heterobimetallic Cyanido‐Bridged Complexes from the Reaction of [MnI(CN)(CO)(tBuNC)4] with Transition‐Metal Chlorides

K. Carl, W. Imhof, Anke Sterzik, 2014 .

Structural and magnetic properties of one-dimensional coordination polymers {trans-[Ru(CN-tBu)4(CN)2]FeX3}n vs. molecular squares {cis-[Ru(CN-tBu)4(CN)2]FeX3}2 (X = NO3, Cl)

W. Plass, E. T. Spielberg, W. Imhof, 2010 .

One-pot ruthenium catalyzed synthesis of spiro[pyrrolidin-2-one] derivatives by a [2 + 2 + 1] cycloaddition of ketimines, carbon monoxide and ethylene

W. Imhof, A. Göbel, 2001 .

μ‐Oxo‐bis[(diethyl 6,17‐dimethyldibenzo[a,h]‐5,9,14,18‐tetraaza[14]annulene‐7,16‐dicarboxylato)iron(III)] sesquihydrate

W. Imhof, E. Jäger, J. Knaudt, 2006 .

Molecular and Crystal Structures of Mononuclear trans‐[Fe(CN)2(tOcNC)4] and trans‐[Mn(CN)(CO)(tOcNC)4] as well as of Cyanide Bridged Coordination Polymers Derived from trans‐[M(CN)2(tOcNC)4] (M = Fe, Ru)

W. Imhof, H. Görls, Kathi Halbauer, 2008 .

(2,6-Diisopropylphenyl)(2-thienylmethylene)amine

Wolfgang Imhof, W. Imhof, 2009, Acta crystallographica. Section E, Structure reports online.

N-(Diphenylvinylidene)-2,6-diisopropylaniline

Wolfgang Imhof, W. Imhof, 2008, Acta crystallographica. Section E, Structure reports online.

Bis(tetramethylbutynediol)nickel(0), the First Pure Monoalkyne Complex of Nickel and Its Chemistry

D. Walther, W. Imhof, H. Görls, 1994 .

Crystal structure of 2-oxo-2-phenylethyl diisopropylcarbamate

W. Imhof, H. Görls, Viktor Martens, 2021, Acta crystallographica. Section E, Crystallographic communications.

Tuning the Electronic Communication between Iron Carbonyl Fragments Coordinated to Bis-imine Ligands by Variation of the Bridging Unit

Manfred Rudolph, W. Imhof, G. Leibeling, 2003 .

(E)-2,4,6-Trimethyl-N-[(1H-pyrrol-2-yl)methylidene]aniline

Wolfgang Imhof, W. Imhof, 2012, Acta crystallographica. Section E, Structure reports online.

Synthesis, Structure and Reactions of the Homoleptic Alkyne Nickel(0) Complex (Alkyne)4Ni3 (Alkyne: 2‐methyl‐4‐trimethylsilyl‐3‐butyn‐2‐ol)

D. Walther, W. Günther, W. Imhof, 1996 .

Steroid imines as chiral ligands. Diastereoselective formation of (1-azadiene)Fe(CO) 3 complexes by sterically tuning the ligand coordination spheres 1 Dedicated to Prof. Dirk Walther on the occasion of his 60th birthday. 1

D. Berger, W. Imhof, M. Dubs, 1999 .

Controlled synthesis of (1,3-tBu2-C5H3)2TiCl2 and (1,3-tBu2-C5H 3)TiCl3. Crystal structure and reactions of (1,3-tBu2-C5H3)TiCl3

S. Abu-Orabi, G. Huttner, W. Imhof, 1992 .

Bis[N,N′-bis(trimethylsilyl)benzamidinato]diethylhafnium(IV)

D. Walther, W. Imhof, R. Fischer, 2006 .

Ligand properties of aromatic azines: C–H activation, metal induced disproportionation and catalytic C–C coupling reactions

Daniel Doennecke, W. Imhof, J. Wunderle, 2004 .

Synthesis and crystal structure of N-ferrocenyl substituted heterocyclic imine ligands and their reactivity towards Fe2(CO)9; Crystal structure of (Fc = (μ5-C5H5)Fe(μ-C5H4))

W. Imhof, 1997 .

The reaction of manganese carbonyl with tert -butylisocyanide : Synthesis and characterization of cis-and trans-[MnI(tBuNC)4(CN) (CO)]

W. Imhof, H. Görls, Kathi Halbauer, 2007 .

Tetrakis(tert-butyl isocyanide)copper(I) chloride monohydrate

W. Imhof, H. Görls, Kathi Halbauer, 2005 .

Tetrakis(tert‐butyl isocyanide‐2κC)dichloro‐1κCl,3κCl‐di‐μ‐cyano‐1κN:2κC;2κC:3κN‐bis[1,3(η4)‐cycloocta‐1,5‐diene]dirhodium(I)ruthenium(II)

W. Imhof, H. Görls, Kathi Halbauer, 2005 .

Organoruthenium sulfur complexes. Synthesis of (μ-S5) [RuCp(CO)2]2 and its reaction with acid chlorides. Preparation of RuCp(CO)2SCOR and molecular structure of RuCp(CO)2SCO(2-O2NC6H4)

G. Huttner, W. Imhof, F. Esmadi, 1989 .

Neue methoden zur einführung von μ3-chalkogenbausteinen in carbonylmetallcluster; XCN− (X = S, Se, Te) und R′XXR′ (X = Se, Te) als selektive reagenzien

L. Zsolnai, G. Huttner, W. Imhof, 1989 .

Regiospecific coupling of coordinated acetylide and disubstituted alkynes. X-ray structures of CpWOs2(CO)7[C(Tol)C(Tol)CCnBu] and CpWOs2(CO)7[C(CF3)C(CF3)CCPh]

G. Huttner, Y. Chi, W. Imhof, 1990 .

REACTIVITY OF NAPHTHYLIMINES TOWARD FE2(CO)9 : OBSERVATION OF THREE DIFFERENT HYDROGEN MIGRATION PATHWAYS

W. Imhof, 1999 .

SYNTHESIS, PROPERTIES, AND SOLID-STATE STRUCTURES OF BIS(ALKYNE)METAL(0) COMPLEXES (METAL = NI, PT) WITH SUBSTITUTED ALKYNEDIOLS AND ALKYNOLS

D. Walther, W. Imhof, A. Schmidt, 1996 .

Crystal Structure Investigations on Imines derived from 3‐Ferrocenyl‐prop‐2‐enal Crystallizing in Non‐centrosymmetric Space Groups

W. Imhof, 2005 .

Tris(tert-butyl isocyanide-κC)carbonylnickel(0)

W. Imhof, H. Görls, Kathi Halbauer, 2008, Acta Crystallographica Section E.

Synthesis of cis- and trans-[M(CN)2(1-CH3-C6H10-NC)4] (M = Fe, Ru) and crystal structure of trans-[Ru(CN)2(1′-CH3-C6H10-NC)4]

W. Imhof, Anke Sterzik, H. Görls, 2010 .

Synthesis and crystal structure of the mixed-valence trinuclear cobalt complex {[Co(CN)3(tBuNC)2](μ-CN)[Co(tBuNC)4](μ-CN)[Co(CN)3(tBuNC)2]}

W. Imhof, H. Görls, Kathi Halbauer, 2008 .

μ‐[Bis(3,3‐dimethylbut‐1‐ynyl)diphenylsilane]bis[(cycloocta‐1,5‐diene)nickel(II)](Ni—Ni)

D. Walther, W. Imhof, Thomas Klettke, 2007 .

Regioselective CC bond formation between ethylene and α-naphthylcarbaldimines catalyzed by Ru3(Co)12: NMR spectroscopic investigations on the proceeding of the reaction

D. Berger, W. Imhof, A. Göbel, 2001 .

The variation of coordination modes of aromatic imines in iron carbonyl complexes: Is there a correlation between bond lengths in organometallic model compounds and the reactivity of the ligands in catalytic C–C bond formation reactions?

W. Imhof, Kathi Halbauer, A. Göbel, 2005 .

Chiral diazadiene and β-ketoimine ligands from the reaction of N,N′-bis-aryl-oxalimidoylchlorides with (S)-prolinol and their reactivity towards iron carbonyls

R. Beckert, W. Imhof, H. Görls, 1999 .

Oxidative transformation of [RCp(CO)2MnSR].bul. radicals into manganese inidene compounds [RCp(CO)2Mn]2SR+

L. Zsolnai, G. Huttner, W. Imhof, 1991 .

Coupling reactions of ynamines. Syntheses, structural characterization and electrochemistry of some nido and closo ferracyclopentadiene complexes

B. Eber, G. Huttner, Y. Jeannin, 1992 .

New Methods to Introduce μ3-Chalcogen Building Blocks into Carbonylmetal Clusters; XCN- (X: S, Se, Te) and R′XXR′ (X: Se, Te) as Selective Reagents.

L. Zsolnai, G. Huttner, W. Imhof, 1990 .

Synthesis and structure of [Ru3(CO)9(µ-H)(µ3-η2-PhCH2CH2CNPh)], a product of an ‘intramolecular’ hydrogen-transfer reaction

W. Imhof, 1996 .

Reaktivität von μ3-Carbincarbonyltrieisenclustern: CO-Substitution, Thermolyse zu μ2-Carbinkomplexen und Addition von Alkinen unter Bildung von η6-Ferracyclopentadienonliganden

L. Zsolnai, G. Huttner, W. Imhof, 1990 .

Sulphur–sulphur, sulphur–selenium, selenium–selenium and selenium–carbon bond activation using Fe3(CO)12: an unexpected formation of an Fe2(CO)6 complex containing a μ2,κ3-C,O,Se-ligand

H. Görls, Ralf Trautwein, W. Weigand, 2019, New Journal of Chemistry.

3-Ferrocenylprop-2-enal

W. Imhof, 2004 .

trans-Dicyanotetrakis(2-isocyano-2,4,4-trimethylpentane)ruthenium(II)

W. Imhof, Kathi Halbauer, 2006 .

fac‐Tris(tert‐butyl isocyanide)tricarbonylmolybdenum(0)

Daniel Doennecke, W. Imhof, H. Görls, 2006 .

Di‐μ2‐carbonyl‐octacarbonyl[μ2‐η2,η2‐N‐cyclohexyl‐N‐(2‐thienylmethylene)amine]tetrairon(0)

W. Imhof, 2006 .

Synthesis and characterization of chiral iron carbonyl complexes from imine ligands with carbohydrates and amino acids as substituents

H. Görls, W. Imhof, H. Görls, 2005 .

Hexacarbonyl[μ2‐η3‐N‐(3‐thienylmethylidene)‐4‐(trimethylsilyl)aniline]diiron

D. Berger, W. Imhof, 2004 .

trans -Bis(acetylacetonato-κ 2 O , O ′)mesityl(tetrahydrofuran-κ O )vanadium(III)

Wolfgang Imhof, Wolfgang Seidel, W. Seidel, 2006 .

2-Halo- and/or 4-ethoxycarbonyl-substituted asymmetric 1,3-diaryltriazenes and 1,3-diarylamidines as well as N-methylated congeners

H. Görls, Sven Krieck, M. Westerhausen, 2020 .

Potassium Salts of Asymmetrically Substituted Amidinates and a Triazenide

Sven Krieck, M. Westerhausen, W. Imhof, 2019, European Journal of Inorganic Chemistry.

Ferrocenyl-substituted imine ligands and their reactivity towards Fe2(CO)9; crystal structure of FcC(H)C(H)C(H)NC6H11 and (η4R1C(H)C(H)C(H)NR2)Fe(CO)3 (R1C6H5, R2Fc; R1Fc, R2C6H11, R1R2Fc; Fc(η5-C5H5) Fe(η5-C5H4))

W. Imhof, 1998 .

N-(2-Ferrocenylethylidene)-4-(trifluoromethyl)aniline

Wolfgang Imhof, W. Imhof, 2009, Acta crystallographica. Section E, Structure reports online.

Synthesis of 13 C-Labelled ω-Hydroxy Carboxylic Acids of the General Formula HO2 13 C-(CH2 )n -CH2 OH or HO2 C-(CH2 )n -13 CH2 OH (n = 12, 16, 20, 28).

S. Spielvogel, W. Imhof, Carina Schink, 2021, Journal of labelled compounds & radiopharmaceuticals.

Synthesis of 13 C-labelled cutin and suberin monomeric dicarboxylic acids of the general formula HO2 13 C-(CH2 )n -13 CO2 H (n = 10, 12, 14, 16, 18, 20, 22, 24, 26, 28).

S. Spielvogel, W. Imhof, Carina Schink, 2020, Journal of labelled compounds & radiopharmaceuticals.

Novel diazadienes based on 1,3,4-oxadiazines: Ligands in iron carbonyl complexes and substrates in catalytic [2+2+1] cycloaddition reactions

R. Beckert, W. Imhof, H. Görls, 2009 .

Mechanistic investigations on C–H activated dealkylating cyclo-amination reactions of substituted triazenes, formamidines and amidines

M. Westerhausen, W. Imhof, D. Kalden, 2020 .

Ruthenium Complex Fragments as Constituents of Trinuclear Photoactive Supramolecular Assemblies Based on Hydrogen Bond Association

S. Rau, W. Imhof, Anke Sterzik, 2007 .

Synchrotron-based Spectroscopic Study of Plasma Generated Amorphous Hydrogenated Carbon films (a-C:H) Post-Functionalized Using Photochemically Active Ruthenium-Polypyridyl Complexes

C. Fischer, W. Imhof, T. Schlebrowski, 2022, Journal of Electron Spectroscopy and Related Phenomena.

Attaching Photochemically Active Ruthenium Polypyridyl Complex Units to Amorphous Hydrogenated Carbon (a‐C:H) Layers

G. Ankerhold, F. Vanhaecke, B. Meermann, 2018, Advanced Materials Interfaces.

Simultaneous quantification of microplastic particles by non-deuterated (NoD) 1H-qNMR from samples comprising different polymer types.

W. Imhof, M. Günther, 2023, The Analyst.

Light-triggered NO release from a nanofibrous non-woven

U. Schubert, R. Wyrwa, M. Schnabelrauch, 2012 .

From Alkynols to Alkynol Complexes. A Molecular Assembly Study

D. Braga, F. Grepioni, D. Walther, 1997 .

Applicable and cost-efficient microplastic analysis by quantitative 1 H-NMR spectroscopy using benchtop NMR and NoD methods.

Nadine Peez, W. Imhof, J. Kolz, 2021, Magnetic resonance in chemistry : MRC.

1‐Acetyl‐1,3‐dicyclohexylurea

W. Imhof, 2007 .

Reversible CO2 Fixation by Iridium(I) Complexes Containing Me2PhP as Ligand

M. Fabra, F. Lahoz, M. Westerhausen, 2010 .

Bis[(1-vinyl-1H-imidazol-2-yl-κN 3)methanamine-κN]copper(II) bis(hexafluoridophosphate)

R. Scopelliti, A. Schiller, W. Imhof, 2011, Acta crystallographica. Section E, Structure reports online.

Feasibility of using quantitative 1H-NMR spectroscopy and ultra-microbalances for investigation of a PET microplastic reference material

H. Emteborg, J. Seghers, Nadine Peez, 2023, Analytical and Bioanalytical Chemistry.

Crystal structure of 2,2-dichloro-1-(piperidin-1-yl)butane-1,3-dione

H. Görls, W. Imhof, Markus Schwierz, 2015, Acta crystallographica. Section E, Crystallographic communications.

Crystal structure of 2,2-dichloro-1-(piperidin-1-yl)ethanone

H. Görls, W. Imhof, Markus Schwierz, 2015, Acta crystallographica. Section E, Crystallographic communications.

Preparation and Conversion of N-Halomethylpyridinium Halides. Comparison with Related Compounds.

H. Görls, E. Anders, A. Opitz, 1999, The Journal of organic chemistry.

Ruthenium Catalyzed One-pot Synthesis of Dihydro-pyrrol-2-one Derivatives from α,β-unsaturated Imines, Carbon Monoxide and Ethylene

D. Berger, W. Imhof, 2000 .

Synthesis and crystal structure of {Ru2(CO)6-μ2-η3-[(Ph)CC(H)C(H)NC(H)C(H)C(H)(Ph)]} — The first structurally characterized iminoallyl ruthenium carbonyl complex

H. Görls, W. Imhof, Tobias Biletzki, 2013 .

{(COD)Ru[RNC(H)–C(H)C(Ph)]2} (RMe, Et): The first structurally characterized mononuclear ruthenium complexes with enyl-imino ligands and their relevance in ruthenium catalyzed C–H activation reactions

H. Görls, R. Menzel, W. Imhof, 2010 .

How to Control the Chemoselectivity of the Catalytic Formation of Chiral γ-Lactams or 2,3-Disubstituted Pyrroles by the Choice of Solvent

Daniel Doennecke, G. Gillies, W. Imhof, 2007 .