A fixed point principle
Doklady Akademii Nauk, Tome 198 (1971) no. 3, pp. 506-508
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@article{DAN_1971_198_3_a3,
author = {A. E. Gel'man},
title = {A fixed point principle},
journal = {Doklady Akademii Nauk},
pages = {506--508},
year = {1971},
volume = {198},
number = {3},
language = {ru},
url = {http://geodesic.mathdoc.fr/item/DAN_1971_198_3_a3/}
}
A. E. Gel'man. A fixed point principle. Doklady Akademii Nauk, Tome 198 (1971) no. 3, pp. 506-508. http://geodesic.mathdoc.fr/item/DAN_1971_198_3_a3/