@article{10_4153_CJM_1973_092_8,
     author = {Elgethun, E. D.},
     title = {Subgroups of {Central} {Separable} {Algebras}},
     journal = {Canadian journal of mathematics},
     pages = {881--887},
     year = {1973},
     volume = {25},
     number = {4},
     doi = {10.4153/CJM-1973-092-8},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1973-092-8/}
}