%0 Journal Article %A Oswaldo Lezama %T Testing flatness and computing rank of a module using syzygies %J Colloquium Mathematicum %D 2009 %P 65-79 %V 117 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm117-1-4/ %R 10.4064/cm117-1-4 %G en %F 10_4064_cm117_1_4