X.-G. HeS. PakvasaH. SugawaraXIAO-GANG HE2019-12-272019-12-272018https://scholars.lib.ntu.edu.tw/handle/123456789/442968Are Fourth?Generation Quarks Integrally Charged?journal article10.1111/j.1749-6632.1987.tb48837.x2-s2.0-84987043536https://www.scopus.com/inward/record.uri?eid=2-s2.0-84987043536&doi=10.1111%2fj.1749-6632.1987.tb48837.x&partnerID=40&md5=5ccf74261db96747036a3ae58fff023a