@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/