@article{ADM_2009_4_a5,
     author = {M. De Falco and F. de Giovanni and C. Musella},
     title = {Groups with many self-normalizing subgroups},
     journal = {Algebra and discrete mathematics},
     pages = {55--65},
     publisher = {mathdoc},
     number = {4},
     year = {2009},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ADM_2009_4_a5/}
}