%0 Journal Article %A V. I. Denisov %T Motion of a massive particle in the vicinity of a singular sphere %J Teoretičeskaâ i matematičeskaâ fizika %D 1997 %P 337-352 %V 112 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/TMF_1997_112_2_a9/ %G ru %F TMF_1997_112_2_a9