@article{DE_1986_22_6_a29,
     author = {V. D. Ponomarev},
     title = {On the structure of some set of solutions of a second order ordinary differential equation},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1089--1090},
     publisher = {mathdoc},
     volume = {22},
     number = {6},
     year = {1986},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1986_22_6_a29/}
}