Geodesic
The topological characteristic of multivalued mappings and fixed-point theorems
Doklady Akademii Nauk, Tome 221 (1975) no. 3, pp. 524-527.

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     author = {B. D. Gel'man},
     title = {The topological characteristic of multivalued mappings and fixed-point theorems},
     journal = {Doklady Akademii Nauk},
     pages = {524--527},
     publisher = {mathdoc},
     volume = {221},
     number = {3},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1975_221_3_a3/}
}
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B. D. Gel'man. The topological characteristic of multivalued mappings and fixed-point theorems. Doklady Akademii Nauk, Tome 221 (1975) no. 3, pp. 524-527. http://geodesic.mathdoc.fr/item/DAN_1975_221_3_a3/