@article{1181071889,
author = {Bohner, Martin and Do\v sl\'y, Ond\v rej},
title = {Disconjugacy and Transformations for Symplectic Systems},
journal = {Rocky Mountain J. Math.},
volume = {27},
number = {4},
year = {1997},
pages = { 707-743},
language = {en},
url = {http://dml.mathdoc.fr/item/1181071889}
}
Bohner, Martin; Došlý, Ondřej. Disconjugacy and Transformations for Symplectic Systems. Rocky Mountain J. Math., Tome 27 (1997) no. 4, pp. 707-743. http://gdmltest.u-ga.fr/item/1181071889/