@article{FAA_1981_15_4_a6,
     author = {Yu. N. Valitskii},
     title = {A four-point problem for a differential equation in a {Banach} space},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {69--70},
     publisher = {mathdoc},
     volume = {15},
     number = {4},
     year = {1981},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1981_15_4_a6/}
}