Shieh J.-S.Chiou Y.-R.SHOU-ZEN FAN2018-09-102018-09-102011http://www.scopus.com/inward/record.url?eid=2-s2.0-84866702321&partnerID=MN8TOARShttp://scholars.lib.ntu.edu.tw/handle/123456789/361619Developing a monitoring psychological stress Index system via photoplethysmographyconference paper