%0 Journal Article
%A D. V. Karpov
%T Upper bound on  the number of edges of an almost planar bipartite graph
%J Zapiski Nauchnykh Seminarov POMI
%D 2012
%P 12-30
%V 406
%I mathdoc
%U http://geodesic.mathdoc.fr/item/ZNSL_2012_406_a1/
%G ru
%F ZNSL_2012_406_a1