CHE-MING TENG2018-09-102018-09-101984http://www.scopus.com/inward/record.url?eid=2-s2.0-0021717078&partnerID=MN8TOARShttp://scholars.lib.ntu.edu.tw/handle/123456789/306283[SDGs]SDG6journal article10.1016/0049-3848(84)90189-0