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Cyclodextrins as chiral stationary phases in capillary gas chromatography. Part VII: Cyclodextrins with an inverse substitution pattern – synthesis and enantioselectivity†

W. König, A. Krebs, D. Icheln, 1990 .

Carbonylniobium chemistry. VI: Derivatives of [Nb(η5-C5H5)H(CO)3] containing a niobium-metal bond

D. Rehder, F. Näumann, I. Pforr, 1983 .