Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1976_12_11_a24, author = {V. A. Kostin}, title = {The smoothness of the solutions of certain equations of parabolic type. {III}}, journal = {Differencialʹnye uravneni\^a}, pages = {2097--2100}, publisher = {mathdoc}, volume = {12}, number = {11}, year = {1976}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1976_12_11_a24/} }
V. A. Kostin. The smoothness of the solutions of certain equations of parabolic type. III. Differencialʹnye uravneniâ, Tome 12 (1976) no. 11, pp. 2097-2100. http://geodesic.mathdoc.fr/item/DE_1976_12_11_a24/