@article{DE_1980_16_10_a13,
     author = {Tran Duc Van},
     title = {Solvability of boundary value problems for infinite-order nonlinear degenerate differential equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1850--1863},
     publisher = {mathdoc},
     volume = {16},
     number = {10},
     year = {1980},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1980_16_10_a13/}
}