@article{GDZPPN002410133,
title = {Groups All of Whose Subgroups are M-Groups.},
journal = {Mathematische Zeitschrift},
volume = {129},
year = {1972},
pages = {73-78},
zbl = {0248.20008},
url = {http://dml.mathdoc.fr/item/GDZPPN002410133}
}
Winter, David L.; F., Murphy Paul. Groups All of Whose Subgroups are M-Groups.. Mathematische Zeitschrift, Tome 129 (1972) pp. 73-78. http://gdmltest.u-ga.fr/item/GDZPPN002410133/