TSIU-KWEN LEELin, J.-S.J.-S.Lin2018-09-102018-09-101996http://www.scopus.com/inward/record.url?eid=2-s2.0-0010605308&partnerID=MN8TOARShttp://scholars.lib.ntu.edu.tw/handle/123456789/321410A result on derivationsjournal article10.1090/S0002-9939-96-03234-02-s2.0-0010605308WOS:A1996UW73400007