@article{10_4153_CJM_1992_026_6,
     author = {Ulbrich, K.-H.},
     title = {On {Nonabelian} {H} 2 for {Profinite} {Groups}},
     journal = {Canadian journal of mathematics},
     pages = {388--399},
     year = {1992},
     volume = {44},
     number = {2},
     doi = {10.4153/CJM-1992-026-6},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1992-026-6/}
}