TY - JOUR AU - I. Ya. Viner TI - Differential equations with involutions JO - Differencialʹnye uravneniâ PY - 1969 SP - 1131 EP - 1137 VL - 5 IS - 6 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1969_5_6_a17/ LA - ru ID - DE_1969_5_6_a17 ER -