@article{10_4153_CJM_1969_105_1,
     author = {Billis, M. J.},
     title = {Finite {Groups} whose {Powers} have no {Countably} {Infinite} {Factor} {Groups}},
     journal = {Canadian journal of mathematics},
     pages = {965--969},
     year = {1969},
     volume = {21},
     number = {1},
     doi = {10.4153/CJM-1969-105-1},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1969-105-1/}
}