Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1972_8_1_a2, author = {D. K. Gvazava}, title = {Certain estimates for equations of mixed type}, journal = {Differencialʹnye uravneni\^a}, pages = {17--23}, publisher = {mathdoc}, volume = {8}, number = {1}, year = {1972}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1972_8_1_a2/} }
D. K. Gvazava. Certain estimates for equations of mixed type. Differencialʹnye uravneniâ, Tome 8 (1972) no. 1, pp. 17-23. http://geodesic.mathdoc.fr/item/DE_1972_8_1_a2/