TY - JOUR AU - T. V. Chekmarev TI - Generalization of a theorem relating to a system of Euler--Poisson--Darboux equations JO - Differencialʹnye uravneniâ PY - 1983 SP - 1089 EP - 1090 VL - 19 IS - 6 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1983_19_6_a24/ LA - ru ID - DE_1983_19_6_a24 ER -