@article{SM_1992_71_1_a0,
author = {I. K. Babenko},
title = {Periodic trajectories in three-dimensional {Birkhoffs} billiards},
journal = {Sbornik. Mathematics},
pages = {1--13},
year = {1992},
volume = {71},
number = {1},
language = {en},
url = {http://geodesic.mathdoc.fr/item/SM_1992_71_1_a0/}
}
I. K. Babenko. Periodic trajectories in three-dimensional Birkhoffs billiards. Sbornik. Mathematics, Tome 71 (1992) no. 1, pp. 1-13. http://geodesic.mathdoc.fr/item/SM_1992_71_1_a0/
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