HSU-CHUN YEN2020-06-162020-06-161998https://scholars.lib.ntu.edu.tw/handle/123456789/502449journal article10.1007/s0023600501382-s2.0-0032339482https://www.scopus.com/inward/record.uri?eid=2-s2.0-0032339482&doi=10.1007%2fs002360050138&partnerID=40&md5=ca839330af378421ae2a66a9c5c50bbe