On three-periodic trajectories of multi-dimensional dual billiards.
Tabachnikov, Serge
Geometry & Topology, Tome 7 (2003), p. 993-1004 / Harvested from The Electronic Library of Mathematics
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Publié le : 2003-01-01
DOI : https://doi.org/10.2140/agt.2003.3.993
EUDML-ID : urn:eudml:doc:123064 
@article{02000808,
     title = {On three-periodic trajectories of multi-dimensional dual billiards.},
     journal = {Geometry \& Topology},
     volume = {7},
     year = {2003},
     pages = {993-1004},
     doi = {10.2140/agt.2003.3.993},
     zbl = {1026.37055},
     language = {en},
     url = {http://dml.mathdoc.fr/item/02000808}
}

Tabachnikov, Serge. On three-periodic trajectories of multi-dimensional dual billiards.. Geometry & Topology, Tome 7 (2003) pp. 993-1004. doi : 10.2140/agt.2003.3.993. http://gdmltest.u-ga.fr/item/02000808/