@article{10_4153_CMB_1971_059_4,
     author = {Fantham, Peter},
     title = {On {Canonical} {Generators} of {Subgroups}},
     journal = {Canadian mathematical bulletin},
     pages = {321--323},
     year = {1971},
     volume = {14},
     number = {3},
     doi = {10.4153/CMB-1971-059-4},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1971-059-4/}
}