@article{DAN_1962_145_4_a6,
     author = {I. F. Kushnirchuk},
     title = {On a partial differential equation of higher order},
     journal = {Doklady Akademii Nauk},
     pages = {727--730},
     publisher = {mathdoc},
     volume = {145},
     number = {4},
     year = {1962},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1962_145_4_a6/}
}