@article{DE_1972_8_7_a0,
     author = {N. E. Bol'shakov},
     title = {Stability with respect to the first approximation in the case of $g$-perturbations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1143--1152},
     publisher = {mathdoc},
     volume = {8},
     number = {7},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1972_8_7_a0/}
}