@article{1256047725, author = {Avrunin, George S.}, title = {$2$-cohomology of some unitary groups}, journal = {Illinois J. Math.}, volume = {24}, number = {4}, year = {1980}, pages = { 317-332}, language = {en}, url = {http://dml.mathdoc.fr/item/1256047725} }
Avrunin, George S. $2$-cohomology of some unitary groups. Illinois J. Math., Tome 24 (1980) no. 4, pp. 317-332. http://gdmltest.u-ga.fr/item/1256047725/