%0 Journal Article %A Goddard, Jerome II %A Shivaji, Ratnasingham %T Halo-shaped bifurcation curves in ecological systems %J Electronic journal of differential equations %D 2014 %V 2014 %U http://geodesic.mathdoc.fr/item/EJDE_2014__2014__a43/ %G en %F EJDE_2014__2014__a43