@article{MZ_1972__129_171816,
     author = {Murray Schacher and Gary M. Seitz},
     title = {...-Groups that are {M-Groups.}},
     journal = {Mathematische Zeitschrift},
     pages = {43--48},
     publisher = {mathdoc},
     volume = {129},
     year = {1972},
     zbl = {0234.20002},
     url = {http://geodesic.mathdoc.fr/item/MZ_1972__129_171816/}
}