%0 Journal Article %A Yu. I. Sapronov %T Semiregular corner singularities of smooth functions %J Sbornik. Mathematics %D 1991 %P 151-163 %V 68 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1991_68_1_a7/ %G en %F SM_1991_68_1_a7