Li, Q.F.Q.F.LiKWO-RAY CHU2019-12-262019-12-261982https://scholars.lib.ntu.edu.tw/handle/123456789/440566journal article10.1007/BF010097292-s2.0-0020185804https://www.scopus.com/inward/record.uri?eid=2-s2.0-0020185804&doi=10.1007%2fBF01009729&partnerID=40&md5=35134d23932ce30672077c796df245a3