@article{DAN_1969_184_1_a9,
     author = {S. I. Pokhozhaev},
     title = {Normal solvability of nonlinear equations},
     journal = {Doklady Akademii Nauk},
     pages = {40--43},
     publisher = {mathdoc},
     volume = {184},
     number = {1},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1969_184_1_a9/}
}