@article{00733117,
title = {Existence of conjugate points for second-order linear differential equations.},
journal = {Georgian Mathematical Journal},
volume = {2},
year = {1995},
pages = {93-98},
doi = {10.1007/BF02257736},
zbl = {0820.34018},
language = {en},
url = {http://dml.mathdoc.fr/item/00733117}
}
Lomtatidze, A. Existence of conjugate points for second-order linear differential equations.. Georgian Mathematical Journal, Tome 2 (1995) pp. 93-98. doi : 10.1007/BF02257736. http://gdmltest.u-ga.fr/item/00733117/