@article{GDZPPN002311119, title = {The Schur Multipliers of Sp6(Z),Spin8(Z),Spin7(Z),andF4(Z).}, journal = {Mathematische Annalen}, volume = {217}, year = {1975}, pages = {165-172}, zbl = {0291.20058}, url = {http://dml.mathdoc.fr/item/GDZPPN002311119} }
Stein, Michael R. The Schur Multipliers of Sp6(Z),Spin8(Z),Spin7(Z),andF4(Z).. Mathematische Annalen, Tome 217 (1975) pp. 165-172. http://gdmltest.u-ga.fr/item/GDZPPN002311119/