2018-09-102018-09-102013http://www.scopus.com/inward/record.url?eid=2-s2.0-84887559008&partnerID=MN8TOARShttp://scholars.lib.ntu.edu.tw/handle/123456789/378544Colorful oxide film formation on titanium by using EDM processjournal article10.1007/s12541-013-0262-0