%0 Journal Article %A E. M. Il'in %T Singularities of weak solutions of elliptic equations with discontinuous coefficients. II.~Angular points of lines of gap %J Zapiski Nauchnykh Seminarov POMI %D 1974 %P 166-169 %V 47 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZNSL_1974_47_a12/ %G ru %F ZNSL_1974_47_a12