@article{IVM_1986_12_a4,
     author = {V. Ya. Derr},
     title = {Sufficient conditions for the nonoscillation of a~second-order equation with respect to a~functional},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {21--26},
     publisher = {mathdoc},
     number = {12},
     year = {1986},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1986_12_a4/}
}