@article{1255629820,
author = {Conrad, Paul},
title = {Completions of groups of class $2$},
journal = {Illinois J. Math.},
volume = {5},
number = {1},
year = {1961},
pages = { 212-224},
language = {en},
url = {http://dml.mathdoc.fr/item/1255629820}
}
Conrad, Paul. Completions of groups of class $2$. Illinois J. Math., Tome 5 (1961) no. 1, pp. 212-224. http://gdmltest.u-ga.fr/item/1255629820/