WEI-SHU HOUAndrea Soddu2019-12-272019-12-272006https://scholars.lib.ntu.edu.tw/handle/123456789/442695eV seesaw with four generationsjournal article10.1016/j.physletb.2006.05.0112-s2.0-33744975249https://www.scopus.com/inward/record.uri?eid=2-s2.0-33744975249&doi=10.1016%2fj.physletb.2006.05.011&partnerID=40&md5=e37783378cb02d1b2749406ff1e747e8