@article{10_4153_CJM_1976_063_2,
     author = {Sacerdote, George S.},
     title = {On the {Groups} of {Britton's} {Theorem} {A}},
     journal = {Canadian journal of mathematics},
     pages = {635--639},
     year = {1976},
     volume = {28},
     number = {3},
     doi = {10.4153/CJM-1976-063-2},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1976-063-2/}
}