@article{02163652,
title = {Symplectic difference systems: oscillation theory and hyperbolic Pr\"ufer transformation.},
journal = {Abstract and Applied Analysis},
volume = {2004},
year = {2004},
pages = {285-294},
doi = {10.1155/S108533750430607X},
zbl = {1074.39005},
language = {en},
url = {http://dml.mathdoc.fr/item/02163652}
}
Došlý, Ondřej. Symplectic difference systems: oscillation theory and hyperbolic Prüfer transformation.. Abstract and Applied Analysis, Tome 2004 (2004) pp. 285-294. doi : 10.1155/S108533750430607X. http://gdmltest.u-ga.fr/item/02163652/