@article{GDZPPN002415429, title = {The Frattini Subgroup of Locally Free Groups.}, journal = {Mathematische Zeitschrift}, volume = {142}, year = {1975}, pages = {199-204}, zbl = {0283.20024}, url = {http://dml.mathdoc.fr/item/GDZPPN002415429} }
Poss, Samuel. The Frattini Subgroup of Locally Free Groups.. Mathematische Zeitschrift, Tome 142 (1975) pp. 199-204. http://gdmltest.u-ga.fr/item/GDZPPN002415429/