@article{TM_1972_117_a17,
     author = {G. N. Yakovlev},
     title = {The first boundary value problem for quasilinear second order elliptic equations},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {321--340},
     year = {1972},
     volume = {117},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_1972_117_a17/}
}