@article{DE_1997_33_1_a8,
     author = {A. M. Krasnosel'skii and M. A. Krasnosel'skii},
     title = {Vector fields in the direct product of spaces, and applications to differential equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {60--67},
     publisher = {mathdoc},
     volume = {33},
     number = {1},
     year = {1997},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1997_33_1_a8/}
}