@article{MZ_1970__118_171450,
     author = {Patrick X. Gallagher},
     title = {The {Number} of {Conjugacy} {Classes} in a {Finite} {Group.}},
     journal = {Mathematische Zeitschrift},
     pages = {175--179},
     year = {1970},
     volume = {118},
     zbl = {0221.20006},
     url = {http://geodesic.mathdoc.fr/item/MZ_1970__118_171450/}
}