%0 Journal Article %A I. D. Shkredov %T On a~two-dimensional analogue of Szemer\'edi's theorem in Abelian groups %J Izvestiya. Mathematics %D 2009 %P 1033-1075 %V 73 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM2_2009_73_5_a6/ %G en %F IM2_2009_73_5_a6