@article{DE_1972_8_7_a21,
     author = {V. A. Ptichkin},
     title = {A linearized method of determining the general solution of a finite equation},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1320--1322},
     publisher = {mathdoc},
     volume = {8},
     number = {7},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1972_8_7_a21/}
}