%0 Journal Article
%A V. A. Zalgaller
%T On $k$-directions which are singular for a convex body $F$ in $R^n$
%J Zapiski Nauchnykh Seminarov POMI
%D 1972
%P 67-72
%V 27
%U http://geodesic.mathdoc.fr/item/ZNSL_1972_27_a5/
%G ru
%F ZNSL_1972_27_a5