@article{PMIHES_2013__118__193_0,
     author = {Herfort, Wolfgang and Zalesskii, Pavel},
     title = {Virtually free pro-\protect\emph{p} groups},
     journal = {Publications Math\'ematiques de l'IH\'ES},
     pages = {193--211},
     publisher = {Springer Berlin Heidelberg},
     address = {Berlin/Heidelberg},
     volume = {118},
     year = {2013},
     doi = {10.1007/s10240-013-0051-4},
     mrnumber = {3150249},
     zbl = {1288.20037},
     language = {en},
     url = {http://archive.numdam.org/articles/10.1007/s10240-013-0051-4/}
}