%0 Journal Article %A Coke S. Reed %T Concerning two methods of defining the center of a dynamical system, II %J Colloquium Mathematicum %D 1973 %P 109-123 %V 27 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm-27-1-109-123/ %R 10.4064/cm-27-1-109-123 %G en %F 10_4064_cm_27_1_109_123