@article{DE_1976_12_9_a16,
     author = {A. E. Polichka and P. E. Sobolevskii},
     title = {Rothe's method of approximate solution of the {Cauchy} problem for differential equations in a {Banach} space with a variable unbounded operator},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1693--1704},
     year = {1976},
     volume = {12},
     number = {9},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1976_12_9_a16/}
}