@article{SM_1974_23_2_a7,
     author = {M. I. Vishik and A. V. Fursikov},
     title = {Some questions in the theory of nonlinear elliptic and parabolic equations},
     journal = {Sbornik. Mathematics},
     pages = {287--318},
     publisher = {mathdoc},
     volume = {23},
     number = {2},
     year = {1974},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1974_23_2_a7/}
}