@article{DAN_1975_225_6_a4,
     author = {M. A. Krasnosel'skii and A. V. Sobolev},
     title = {On cones of finite rank},
     journal = {Doklady Akademii Nauk},
     pages = {1256--1259},
     year = {1975},
     volume = {225},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1975_225_6_a4/}
}