@article{DE_1972_8_11_a18,
     author = {E. P. Belan and A. M. Eyshinsky},
     title = {Linear differential equations that are invariant with respect to a finite group of linear-fractional substitutions},
     journal = {Differencialʹnye uravneni\^a},
     pages = {2073--2075},
     publisher = {mathdoc},
     volume = {8},
     number = {11},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1972_8_11_a18/}
}