@article{IM2_1988_30_2_a1,
     author = {N. V. Krylov},
     title = {On~the first boundary value problem for nonlinear degenerate elliptic equations},
     journal = {Izvestiya. Mathematics },
     pages = {217--244},
     publisher = {mathdoc},
     volume = {30},
     number = {2},
     year = {1988},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1988_30_2_a1/}
}