@article{05169469,
title = {Groups all whose nonnormal subgroups generate a nontrivial proper subgroup.},
journal = {Sibirskij Matematicheskij Zhurnal},
volume = {47},
year = {2006},
pages = {211-235},
zbl = {1118.20027},
language = {en},
url = {http://dml.mathdoc.fr/item/05169469}
}
Chernikov, N.S.; Dovzhenko, S.A. Groups all whose nonnormal subgroups generate a nontrivial proper subgroup.. Sibirskij Matematicheskij Zhurnal, Tome 47 (2006) pp. 211-235. http://gdmltest.u-ga.fr/item/05169469/