@article{00770109, title = {Kneser-type oscillation criteria for selfadjoint two-term differential equations.}, journal = {Georgian Mathematical Journal}, volume = {2}, year = {1995}, pages = {241-258}, doi = {10.1007/BF02261699}, zbl = {0827.34019}, language = {en}, url = {http://dml.mathdoc.fr/item/00770109} }
Došlý, Ondřej; Osička, Jan. Kneser-type oscillation criteria for selfadjoint two-term differential equations.. Georgian Mathematical Journal, Tome 2 (1995) pp. 241-258. doi : 10.1007/BF02261699. http://gdmltest.u-ga.fr/item/00770109/