@article{MZ_1955__63_169515, author = {B.H. Neumann}, title = {Groups with finite classes of conjugate subgroups.}, journal = {Mathematische Zeitschrift}, pages = {76--96}, year = {1955}, volume = {63}, zbl = {0064.25201}, url = {http://geodesic.mathdoc.fr/item/MZ_1955__63_169515/} }