TY - JOUR AU - A. Kh. Mamyan TI - The construction of solvable extensions in a parallelepiped for linear differential operators with constant coefficients JO - Differencialʹnye uravneniâ PY - 1970 SP - 358 EP - 370 VL - 6 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1970_6_2_a14/ LA - ru ID - DE_1970_6_2_a14 ER -