@article{GDZPPN002239728, title = {Pro-p Galois groups of rank ... 4.}, journal = {Manuscripta mathematica}, volume = {95}, year = {1998}, pages = {251-272}, zbl = {0931.12003}, url = {http://dml.mathdoc.fr/item/GDZPPN002239728} }
Koenigsmann, Jochen. Pro-p Galois groups of rank ... 4.. Manuscripta mathematica, Tome 95 (1998) pp. 251-272. http://gdmltest.u-ga.fr/item/GDZPPN002239728/