Geodesic
On the curvatures of tangent spheres
Informatics and Automation, Discrete geometry and topology, Tome 196 (1991), pp. 90-92.

Voir la notice de l'article provenant de la source Math-Net.Ru

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     author = {M. D. Kovalev},
     title = {On the curvatures of tangent spheres},
     journal = {Informatics and Automation},
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     publisher = {mathdoc},
     volume = {196},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_1991_196_a7/}
}
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M. D. Kovalev. On the curvatures of tangent spheres. Informatics and Automation, Discrete geometry and topology, Tome 196 (1991), pp. 90-92. http://geodesic.mathdoc.fr/item/TRSPY_1991_196_a7/