TY - JOUR AU - I. A. Shishmarev TI - The Cauchy problem for hypoelliptic systems and representation of the interaction JO - Differencialʹnye uravneniâ PY - 1979 SP - 1337 EP - 1339 VL - 15 IS - 7 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1979_15_7_a18/ LA - ru ID - DE_1979_15_7_a18 ER -