@article{DE_1997_33_6_a19,
     author = {E. A. Ermolaev and S. V. Zhestkov and V. I. Kuvshinov},
     title = {Classes of exactly solvable degenerate systems of universal nonlinear partial differential equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {845--846},
     publisher = {mathdoc},
     volume = {33},
     number = {6},
     year = {1997},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1997_33_6_a19/}
}