%0 Journal Article %A Ahmad Abbasi %A Ali Ramin %T Exact sequences of graphs %J Algebra and discrete mathematics %D 2019 %P 1-19 %V 28 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/ADM_2019_28_1_a0/ %G en %F ADM_2019_28_1_a0