%0 Journal Article %A Fürst, Maximilian %A Rautenbach, Dieter %T A Short Proof for a Lower Bound on the Zero Forcing Number %J Discussiones Mathematicae. Graph Theory %D 2020 %P 355-360 %V 40 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DMGT_2020_40_1_a24/ %G en %F DMGT_2020_40_1_a24