@article{1256051607, author = {Larmore, L. L. and Thomas, E.}, title = {Group extensions and twisted cohomology theories}, journal = {Illinois J. Math.}, volume = {17}, number = {4}, year = {1973}, pages = { 397-410}, language = {en}, url = {http://dml.mathdoc.fr/item/1256051607} }
Larmore, L. L.; Thomas, E. Group extensions and twisted cohomology theories. Illinois J. Math., Tome 17 (1973) no. 4, pp. 397-410. http://gdmltest.u-ga.fr/item/1256051607/