%0 Journal Article %A I. A. Cheltsov %T Factoriality of nodal three-dimensional varieties and connectedness of the locus of log canonical singularities %J Sbornik. Mathematics %D 2006 %P 387-414 %V 197 %N 3 %U http://geodesic.mathdoc.fr/item/SM_2006_197_3_a4/ %G en %F SM_2006_197_3_a4