@article{MM2_1998__95_3_156374,
     author = {Jochen Koenigsmann},
     title = {Pro-p {Galois} groups of rank ... 4.},
     journal = {Manuscripta mathematica},
     pages = {251--272},
     publisher = {mathdoc},
     volume = {95},
     number = {3},
     year = {1998},
     zbl = {0931.12003},
     url = {http://geodesic.mathdoc.fr/item/MM2_1998__95_3_156374/}
}