@article{MZ_1962__78_170009,
     author = {Martin Greendlinger},
     title = {A {Class} of {Groups} {All} of {Whose} {Elements}},
     journal = {Mathematische Zeitschrift},
     pages = {91--96},
     publisher = {mathdoc},
     volume = {78},
     year = {1962},
     zbl = {0111.02801},
     url = {http://geodesic.mathdoc.fr/item/MZ_1962__78_170009/}
}