%0 Journal Article
%A G. V. Nenashev
%T On Heawood-type  problem for maps with tangencies
%J Zapiski Nauchnykh Seminarov POMI
%D 2014
%P 74-88
%V 427
%I mathdoc
%U http://geodesic.mathdoc.fr/item/ZNSL_2014_427_a4/
%G ru
%F ZNSL_2014_427_a4