Euclidean planes in open three-dimensional manifolds of nonpositive curvature
Algebra i analiz, Tome 3 (1991) no. 1, pp. 102-117
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@article{AA_1991_3_1_a3,
author = {S. V. Buyalo},
title = {Euclidean planes in open three-dimensional manifolds of nonpositive curvature},
journal = {Algebra i analiz},
pages = {102--117},
year = {1991},
volume = {3},
number = {1},
language = {ru},
url = {http://geodesic.mathdoc.fr/item/AA_1991_3_1_a3/}
}
S. V. Buyalo. Euclidean planes in open three-dimensional manifolds of nonpositive curvature. Algebra i analiz, Tome 3 (1991) no. 1, pp. 102-117. http://geodesic.mathdoc.fr/item/AA_1991_3_1_a3/