%0 Journal Article
%A V. S. Kulikov
%T On~the number of singular focal centres of the projection of an algebraic surface
%J Trudy Matematicheskogo Instituta imeni V.A. Steklova
%D 1984
%P 279-280
%V 39
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/RM_1984_39_5_a15/
%G en
%F RM_1984_39_5_a15