@article{DAN_1989_308_6_a4,
     author = {\'E. V. Nikol'skii},
     title = {The method of generalized functionally invariant solutions for},
     journal = {Doklady Akademii Nauk},
     pages = {1304--1308},
     publisher = {mathdoc},
     volume = {308},
     number = {6},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1989_308_6_a4/}
}