YEONG-CHUAN KAO2018-09-102018-09-101988http://www.scopus.com/inward/record.url?eid=2-s2.0-45549111741&partnerID=MN8TOARShttp://scholars.lib.ntu.edu.tw/handle/123456789/340365Background fields, composite operators, and asymptotic freedomjournal article10.1016/0370-2693(88)90613-22-s2.0-45549111741