TY - JOUR AU - E. P. Belan AU - A. M. Eyshinsky TI - Linear differential equations that are invariant with respect to a finite group of linear-fractional substitutions JO - Differencialʹnye uravneniâ PY - 1972 SP - 2073 EP - 2075 VL - 8 IS - 11 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1972_8_11_a18/ LA - ru ID - DE_1972_8_11_a18 ER -