@article{DAN_1971_198_1_a3,
     author = {V. P. Glushko},
     title = {Smoothness of solutions of degenerate differential equations in {Banach} space},
     journal = {Doklady Akademii Nauk},
     pages = {20--22},
     publisher = {mathdoc},
     volume = {198},
     number = {1},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1971_198_1_a3/}
}