TY - JOUR AU - M. A. Krasnosel'skii AU - E. A. Lifshits TI - Relativity principles for differential equations with unbounded operators in A Banach space JO - Funkcionalʹnyj analiz i ego priloženiâ PY - 1968 SP - 58 EP - 62 VL - 2 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/FAA_1968_2_4_a4/ LA - ru ID - FAA_1968_2_4_a4 ER -