@article{DE_1978_14_11_a6,
     author = {Tran Duc Van},
     title = {A boundary value problem for degenerate ordinary differential equations of infinite order},
     journal = {Differencialʹnye uravneni\^a},
     pages = {2002--2011},
     publisher = {mathdoc},
     volume = {14},
     number = {11},
     year = {1978},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1978_14_11_a6/}
}