@article{1200784542, author = {Nobusawa, Nobuo}, title = {Central extensions of the symmetric core of a group}, journal = {Osaka J. Math.}, volume = {30}, number = {1}, year = {1993}, pages = { 509-514}, language = {en}, url = {http://dml.mathdoc.fr/item/1200784542} }
Nobusawa, Nobuo. Central extensions of the symmetric core of a group. Osaka J. Math., Tome 30 (1993) no. 1, pp. 509-514. http://gdmltest.u-ga.fr/item/1200784542/