%0 Journal Article %A I. V. Savel'ev %T The structure of the set of singular points of piecewise-linear branched coverings of manifolds %J Izvestiya. Mathematics %D 1986 %P 549-573 %V 27 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM2_1986_27_3_a6/ %G en %F IM2_1986_27_3_a6