%0 Journal Article %A A. B. Kupavskii %A A. M. Raigorodskii %T Obstructions to the realization of distance graphs with large chromatic numbers on spheres of small radii %J Sbornik. Mathematics %D 2013 %P 1435-1479 %V 204 %N 10 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_2013_204_10_a1/ %G en %F SM_2013_204_10_a1