@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/