@article{IVM_1958_2_a0,
     author = {N. V. Azbelev and Z. B. Tsalyuk and E. S. Chichkin},
     title = {Non-oscillatory solutions of non-linear second-order equations},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {3--4},
     publisher = {mathdoc},
     number = {2},
     year = {1958},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1958_2_a0/}
}