TY - JOUR AU - I. I. Golichev TI - The splitting principle for nonselfadjoint partial differential operators JO - Differencialʹnye uravneniâ PY - 1971 SP - 1835 EP - 1844 VL - 7 IS - 10 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1971_7_10_a9/ LA - ru ID - DE_1971_7_10_a9 ER -