@article{10_4153_CJM_1968_042_9,
     author = {Poland, John},
     title = {Finite {Groups} with a given {Number} of {Conjugate} {Classes}},
     journal = {Canadian journal of mathematics},
     pages = {456--464},
     year = {1968},
     volume = {20},
     number = {1},
     doi = {10.4153/CJM-1968-042-9},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1968-042-9/}
}