Back to matchesWe found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleOn the Limit Cycles of a Class of Planar Singular Perturbed Differential Equations.AuthorsYuhai Wu; Jingjing ZhouPublicationScientific World Journal, 2014, p1ISSN1537-744XPublication typeArticleDOI10.1155/2014/379897