A. Zettl
发表
B. M. Brown,
D. McCormack,
A. Zettl,
2000
.
Qingkai Kong,
Anton Zettl,
Qingkai Kong,
1996
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L. Littlejohn,
A. Zettl,
2011
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M. Marletta,
A. Zettl,
2002
.
Anton Zettl,
W. N. Everitt,
A. Zettl,
1986
.
A. Zettl,
Aiping Wang,
2017
.
A. Zettl,
Jiong Sun,
Aiping Wang,
2007
.
A. Zettl,
Jiong Sun,
Aiping Wang,
2007
.
A. Zettl,
G. Stolz,
C. Shubin,
1999
.
Hans G. Kaper,
Man Kam Kwong,
Anton Zettl,
1984
.
M. Kwong,
H. Kaper,
A. Zettl,
1984
.
A. Zettl,
1972
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W. N. Everitt,
A. Zettl,
2003
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M. Kwong,
A. Zettl,
1980
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A. Zettl,
2000
.
A. Zettl,
Jiong Sun,
Xiaoling Hao,
2019,
Journal of Applied Analysis & Computation.
Ji-jun Ao,
A. Zettl,
Xiao-xia Lv,
2017
.
Abstra,
A. Zettl,
2007
.
Qingkai Kong,
Hongyou Wu,
A. Zettl,
2003,
Canadian Journal of Mathematics.
Qingkai Kong,
Hongyou Wu,
A. Zettl,
2001
.
W. N. Everitt,
M. Möller,
A. Zettl,
1997
.
A. Zettl,
H. Wu,
Q. Kong,
1997
.
A. Zettl,
1969
.
Qingkai Kong,
A. Zettl,
1996
.
P. B. Bailey,
W. N. Everitt,
A. Zettl,
1996,
Proceedings of the Royal Society of Edinburgh: Section A Mathematics.
Qingkai Kong,
Anton Zettl,
H. Wu,
1999
.
A. Zettl,
2017
.
Geometric aspects of Sturm-Liouville problems II. Space of boundary conditions for left-definiteness
Qingkai Kong,
Hongyou Wu,
A. Zettl,
2003
.
Qingkai Kong,
Anton Zettl,
H. Wu,
2004
.
M. Marletta,
A. Zettl,
2005
.
M. Marietta,
A. Zettl,
2004
.
Qingkai Kong,
Hongyou Wu,
M. Möller,
2003,
Proceedings of the Royal Society of Edinburgh: Section A Mathematics.
Qingkai Kong,
A. Zettl,
1995
.
Qingkai Kong,
Anton Zettl,
Hongyou Wu,
2001
.
W. N. Everitt,
A. Zettl,
F. Atkinson,
1988,
Differential and Integral Equations.
A. Zettl,
Aiping Wang,
2019,
Mathematical Surveys and
Monographs.
A. Zettl,
Chuan-Fu Yang,
2012
.
A. Zettl,
1976
.
A. Zettl,
1993,
Nature.
A. Zettl,
Jiong Sun,
Zhang Maozhu,
2012,
Results in Mathematics.
M. Eastham,
A. Zettl,
1977,
Proceedings of the Royal Society of Edinburgh: Section A Mathematics.
A. Zettl,
1966
.
Ji-jun Ao,
A. Zettl,
Jiong Sun,
2014
.
W. N. Everitt,
M. Möller,
A. Zettl,
1999,
Proceedings of the Royal Society of Edinburgh: Section A Mathematics.
A. Zettl,
H. Dwyer,
1995
.
A. Zettl,
Jiong Sun,
Siqin Yao,
2015
.
Marco Marletta,
Anton Zettl,
M. Marletta,
2000
.
A. Zettl,
Jiong Sun,
Xiaoling Hao,
2019,
Electronic Journal of Qualitative Theory of Differential Equations.
J. Gunson,
A. Zettl,
J. Gunson,
1987
.
Anton Zettl,
A. Zettl,
2005
.
A. Zettl,
D. Race,
H. Frentzen,
1993,
Proceedings of the Royal Society of Edinburgh: Section A Mathematics.
M. Kwong,
A. Zettl,
M. Giertz,
1981,
Proceedings of the Royal Society of Edinburgh: Section A Mathematics.
Qingkai Kong,
Hongyou Wu,
A. Zettl,
2008,
Proceedings of the Royal Society of Edinburgh: Section A Mathematics.
Qingkai Kong,
Hongyou Wu,
A. Zettl,
1999
.
A. Zettl,
ANTON ZETTL,
1999
.
A. Zettl,
1975
.
Jiong Sun,
Anton Zettl,
A. Zettl,
2013
.
A. Zettl,
Jiong Sun,
Mao-zhu Zhang,
2017
.
Hans G. Kaper,
Man Kam Kwong,
Anton Zettl,
1984,
Proceedings of the Royal Society of Edinburgh: Section A Mathematics.
H. Kaper,
A. Zettl,
C. Lekkerkerker,
1982
.
Man Kam Kwong,
Anton Zettl,
H. G. Kaper,
1984
.
Anton Zettl,
W. N. Everitt,
A. Zettl,
1991
.
Anton Zettl,
W. N. Everitt,
A. Zettl,
1978
.
Guangsheng Wei,
A. Zettl,
Qinglan Bao,
2023,
Electronic Journal of Differential Equations.
A. Zettl,
Jiong Sun,
2015
.
A. Zettl,
Jiong Sun,
Siqin Yao,
2015,
Applications of Mathematics.
A. Zettl,
Aiping Wang,
2018,
Journal of Differential Equations.
A. Zettl,
Jiong Sun,
Yaping Yuan,
2017
.
M. Kwong,
A. Zettl,
1982
.
Anton Zettl,
A. Zettl,
Thomas T. Read,
1977
.
Anton Zettl,
A. Zettl,
1976,
Proceedings of the Royal Society of Edinburgh: Section A Mathematics.
W. D. Evans,
M. Kwong,
A. Zettl,
1983
.
Man Kam Kwong,
Anton Zettl,
M. Kwong,
1981
.
A. Zettl,
1973
.
Anton Zettl,
A. Zettl,
M. Moller,
1995
.
W. D. Evans,
A. Zettl,
R. T. Lewis,
1983
.
M. Kwong,
A. Zettl,
1981,
Proceedings of the Royal Society of Edinburgh: Section A Mathematics.
W. D. Evans,
A. Zettl,
1978,
Proceedings of the Royal Society of Edinburgh: Section A Mathematics.
Paul B. Bailey,
Anton Zettl,
P. B. Bailey,
1991,
TOMS.
A. Zettl,
Aiping Wang,
2017
.
Anton Zettl,
A. Zettl,
1971
.
Ji-jun Ao,
Jiong Sun,
Anton Zettl,
2015,
Appl. Math. Lett..
A. Zettl,
Jiong Sun,
Siqin Yao,
2013
.
Ji-jun Ao,
A. Zettl,
Jiong Sun,
2012
.
L. Kong,
A. Zettl,
H. Wu,
2004
.
W. N. Everitt,
A. Zettl,
1992
.
J. Ridenhour,
A. Zettl,
Aiping Wang,
2012,
Proceedings of the Royal Society of Edinburgh: Section A Mathematics.
E. Coddington,
A. Zettl,
1966
.
A. Zettl,
Aiping Wang,
2013
.
W. D. Evans,
A. Zettl,
1978
.
A. Zettl,
Jiong Sun,
Siqin Yao,
2014
.
A. Zettl,
Jiong Sun,
Xiaoling Hao,
2012
.
A. Zettl,
Jiong Sun,
Xiaoling Hao,
2012
.
Jiong Sun,
Anton Zettl,
A. Zettl,
2011
.
A. Zettl,
Jiong Sun,
Xiaoling Hao,
2011
.
Jiong Sun,
Anton Zettl,
A. Zettl,
2009,
Results in Mathematics.
A. Zettl,
Jiong Sun,
Aiping Wang,
2008
.
Jiong Sun,
Anton Zettl,
A. Zettl,
2008
.
A. Zettl,
D. Race,
1992,
Proceedings of the Royal Society of Edinburgh: Section A Mathematics.
Man Kam Kwong,
Anton Zettl,
M. Kwong,
1993
.
D. K. R. McCormack,
B. M. Brown,
D. McCormack,
1999,
Proceedings of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences.
Paul B. Bailey,
Joachim Weidmann,
Anton Zettl,
1993
.
Paul B. Bailey,
Anton Zettl,
P. B. Bailey,
1991,
TOMS.
P. B. Bailey,
D. Hinton,
W. N. Everitt,
2002
.
A. Zettl,
Jiong Sun,
Yi Zhao,
2016
.
A. Zettl,
Aiping Wang,
2015
.
A. Zettl,
Aiping Wang,
2018,
Journal of Mathematical Analysis and Applications.
W. N. Everitt,
A. Zettl,
1978
.
W. N. Everitt,
A. Zettl,
1977,
Proceedings of the Royal Society of Edinburgh: Section A Mathematics.
W. N. Everitt,
A. Zettl,
1975,
Proceedings of the Royal Society of Edinburgh: Section A Mathematics.
Ji-jun Ao,
Anton Zettl,
Tao Wang,
2021,
AIMS Mathematics.
J. Wong,
A. Zettl,
1973
.
A. Zettl,
Jiong Sun,
Mao-zhu Zhang,
2014
.
M. Kwong,
A. Zettl,
1983
.