%0 Journal Article %A N. V. Ilyushechkin %T On some classes of smooth transformations in the~space of symmetric matrices %J Sbornik. Mathematics %D 1995 %P 75-86 %V 80 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1995_80_1_a3/ %G en %F SM_1995_80_1_a3