@article{FAA_1968_2_4_a4,
     author = {M. A. Krasnosel'skii and E. A. Lifshits},
     title = {Relativity principles for differential equations with unbounded operators in {A} {Banach} space},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {58--62},
     publisher = {mathdoc},
     volume = {2},
     number = {4},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1968_2_4_a4/}
}