@article{DE_1969_5_8_a15,
     author = {P. E. Sobolevskii and M. N. Titenskii},
     title = {An investigation of the solvability of perturbed parabolic equations in a {Banach} space, and a generalized {Bubnov{\textendash}Galerkin} method for their approximate solution},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1495--1502},
     year = {1969},
     volume = {5},
     number = {8},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1969_5_8_a15/}
}