@article{GDZPPN002484498,
title = {Groups of Prime-Power Order Having an Abelian Centralizer of Type (r, 1).},
journal = {Monatshefte f\"ur Mathematik},
volume = {99},
year = {1985},
pages = {1-18},
zbl = {0552.20010},
url = {http://dml.mathdoc.fr/item/GDZPPN002484498}
}
Blackburn, Norman. Groups of Prime-Power Order Having an Abelian Centralizer of Type (r, 1).. Monatshefte für Mathematik, Tome 99 (1985) pp. 1-18. http://gdmltest.u-ga.fr/item/GDZPPN002484498/