Chen C.W.Robertson J.CHUN-WEI CHEN2019-11-272019-11-27199900086223https://www.scopus.com/inward/record.uri?eid=2-s2.0-0032640606&doi=10.1016%2fS0008-6223%2898%2900281-4&partnerID=40&md5=67b81becaae464d33bdc6c585f7c7671https://scholars.lib.ntu.edu.tw/handle/123456789/432886[SDGs]SDG6journal article10.1016/S0008-6223(98)00281-42-s2.0-0032640606