@article{DE_1985_21_8_a23,
     author = {S. B. Penchansky},
     title = {On functionally invariant solutions of a system of partial differential equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1449--1450},
     publisher = {mathdoc},
     volume = {21},
     number = {8},
     year = {1985},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1985_21_8_a23/}
}