@article{DE_1972_8_9_a13,
     author = {Ya. B. Kadymov and G. B. Abdulov},
     title = {The method of successive approximations in connection with second order differential equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1669--1673},
     publisher = {mathdoc},
     volume = {8},
     number = {9},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1972_8_9_a13/}
}