@article{00940797,
title = {Oscillatory criteria for nonlinear },
journal = {Georgian Mathematical Journal},
volume = {3},
year = {1996},
pages = {301-314},
doi = {10.1007/BF02256721},
zbl = {0857.34038},
language = {en},
url = {http://dml.mathdoc.fr/item/00940797}
}
Bartušek, Miroslav. Oscillatory criteria for nonlinear . Georgian Mathematical Journal, Tome 3 (1996) pp. 301-314. doi : 10.1007/BF02256721. http://gdmltest.u-ga.fr/item/00940797/