%0 Journal Article %A Phan Thanh An %T A modification of Graham’s algorithm for determining the convex hull of a finite planar set %J Annales mathematicae et informaticae %D 2007 %P 3-8 %V 34 %I mathdoc %U http://geodesic.mathdoc.fr/item/AMI_2007_34_a0/ %G en %F AMI_2007_34_a0