Cao, H.-D.H.-D.CaoSHU-CHENG CHANGChen, C.-W.C.-W.Chen2020-12-252020-12-252020https://www.scopus.com/inward/record.url?eid=2-s2.0-85078485606&partnerID=40&md5=d7264a5e05d9a479e263fa64cd7d5a43https://scholars.lib.ntu.edu.tw/handle/123456789/533263C -positivity and a classification of closed three-dimensional CR torsion solitonsjournal article10.1007/s00209-020-02471-22-s2.0-85078485606WOS:000515612700003