@article{GDZPPN00239894X,
title = {An Example of Core-Free Quasinormal Subgroups of p-Groups.},
journal = {Mathematische Zeitschrift},
volume = {99},
year = {1967},
pages = {226-227},
zbl = {0189.31702},
url = {http://dml.mathdoc.fr/item/GDZPPN00239894X}
}
Thompson, John G. An Example of Core-Free Quasinormal Subgroups of p-Groups.. Mathematische Zeitschrift, Tome 99 (1967) pp. 226-227. http://gdmltest.u-ga.fr/item/GDZPPN00239894X/