@article{DAN_1972_205_1_a6,
     author = {O. F. Men'shikh},
     title = {Functionally invariant solutions of a class of second-order partial differential equations},
     journal = {Doklady Akademii Nauk},
     pages = {30--32},
     publisher = {mathdoc},
     volume = {205},
     number = {1},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1972_205_1_a6/}
}