MICHAEL KEEVAK2020-03-062020-03-062013https://scholars.lib.ntu.edu.tw/handle/123456789/471601journal article10.1215/00982601-23256682-s2.0-84888351105https://www.scopus.com/inward/record.uri?eid=2-s2.0-84888351105&doi=10.1215%2f00982601-2325668&partnerID=40&md5=e08f4dd8d8bc12897d119a6778642cab