Voir la notice de l'article provenant de la source Math-Net.Ru
@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/} }
V. P. Glushko. Smoothness of solutions of degenerate differential equations in Banach space. Doklady Akademii Nauk, Tome 198 (1971) no. 1, pp. 20-22. http://geodesic.mathdoc.fr/item/DAN_1971_198_1_a3/