@article{10_4153_CJM_1991_011_8,
     author = {Ulbrich, K.-H.},
     title = {On {Nonabelian} {H2} for {Profinite} {Groups}},
     journal = {Canadian journal of mathematics},
     pages = {213--224},
     year = {1991},
     volume = {43},
     number = {1},
     doi = {10.4153/CJM-1991-011-8},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1991-011-8/}
}