@article{10_4153_CJM_1977_123_3,
     author = {Frankfurt, Richard},
     title = {Quasicyclic {Subnormal} {Semigroups}},
     journal = {Canadian journal of mathematics},
     pages = {1230--1246},
     year = {1977},
     volume = {29},
     number = {6},
     doi = {10.4153/CJM-1977-123-3},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1977-123-3/}
}