@article{10_4153_CMB_1969_025_5,
     author = {Lam, Tsit-Yuen},
     title = {A {Commutator} {Formula} for a {Pair} of {Subgroups} and {A} {Theorem} of {Blackburn}},
     journal = {Canadian mathematical bulletin},
     pages = {217--219},
     year = {1969},
     volume = {12},
     number = {2},
     doi = {10.4153/CMB-1969-025-5},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1969-025-5/}
}