@article{IM2_1979_13_2_a6,
     author = {N. V. Krylov},
     title = {On the maximum principle for nonlinear parabolic and elliptic equations},
     journal = {Izvestiya. Mathematics },
     pages = {335--347},
     publisher = {mathdoc},
     volume = {13},
     number = {2},
     year = {1979},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1979_13_2_a6/}
}