@article{01017000, title = {Oscillation and nonoscillation criteria for second-order linear differential equations.}, journal = {Georgian Mathematical Journal}, volume = {4}, year = {1997}, pages = {129-138}, doi = {10.1023/A:1022978000000}, zbl = {0877.34029}, language = {en}, url = {http://dml.mathdoc.fr/item/01017000} }
Lomtatidze, A. Oscillation and nonoscillation criteria for second-order linear differential equations.. Georgian Mathematical Journal, Tome 4 (1997) pp. 129-138. doi : 10.1023/A:1022978000000. http://gdmltest.u-ga.fr/item/01017000/