%0 Journal Article %A Manchev, Peter %T Oligopoly Model of a Debit Card Network %J Serdica Mathematical Journal %D 2007 %P 35-46 %V 33 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/SMJ2_2007_33_1_a1/ %G en %F SMJ2_2007_33_1_a1