MING-CHANG KANG2018-09-102018-09-102013http://www.scopus.com/inward/record.url?eid=2-s2.0-84884952911&partnerID=MN8TOARShttp://scholars.lib.ntu.edu.tw/handle/123456789/377287Noether's problem and unramified brauer groupsbook10.4310/AJM.2013.v17.n4.a8