%0 Journal Article %A V. V. Cherkasova %T Connectivities induced by the rolling of a~ball on a~surface %J Izvestiâ vysših učebnyh zavedenij. Matematika %D 2009 %P 79-84 %N 11 %I mathdoc %U http://geodesic.mathdoc.fr/item/IVM_2009_11_a9/ %G ru %F IVM_2009_11_a9