@article{1102969770, author = {Brown, Lawrence G.}, title = {Extensions of topological groups.}, journal = {Pacific J. Math.}, volume = {39}, number = {3}, year = {1971}, pages = { 71-78}, language = {en}, url = {http://dml.mathdoc.fr/item/1102969770} }
Brown, Lawrence G. Extensions of topological groups.. Pacific J. Math., Tome 39 (1971) no. 3, pp. 71-78. http://gdmltest.u-ga.fr/item/1102969770/