Voir la notice de l'article provenant de la source Math-Net.Ru
@article{TRSPY_1972_117_a17, author = {G. N. Yakovlev}, title = {The first boundary value problem for quasilinear second order elliptic equations}, journal = {Informatics and Automation}, pages = {321--340}, publisher = {mathdoc}, volume = {117}, year = {1972}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/TRSPY_1972_117_a17/} }
G. N. Yakovlev. The first boundary value problem for quasilinear second order elliptic equations. Informatics and Automation, Investigations in the theory of differentiable functions of many variables and its applications. Part IV, Tome 117 (1972), pp. 321-340. http://geodesic.mathdoc.fr/item/TRSPY_1972_117_a17/