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Furthermore, we study the Poincar\u00e9 bifurcation for its perturbed system as it has a center at the origin, find the Poincar\u00e9 cyclicity up to first order of \u03b5. <\/jats:p>","DOI":"10.1142\/s0218127415501357","type":"journal-article","created":{"date-parts":[[2015,9,29]],"date-time":"2015-09-29T22:25:44Z","timestamp":1443565544000},"page":"1550135","source":"Crossref","is-referenced-by-count":6,"title":["Center Problems and Limit Cycle Bifurcations in a Class of Quasi-Homogeneous Systems"],"prefix":"10.1142","volume":"25","author":[{"given":"Yanqin","family":"Xiong","sequence":"first","affiliation":[{"name":"Department of Mathematics, Shanghai Normal University, Guilin Rd. 100, Shanghai 200234, P. R. China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Maoan","family":"Han","sequence":"additional","affiliation":[{"name":"Department of Mathematics, Shanghai Normal University, Guilin Rd. 100, Shanghai 200234, P. R. 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