Voir la notice de l'article provenant de la source Numdam
@article{CM_1987__63_3_409_0, author = {Ulbrich, K.-H.}, title = {On cohomology of graded group categories}, journal = {Compositio Mathematica}, pages = {409--417}, publisher = {Martinus Nijhoff Publishers}, volume = {63}, number = {3}, year = {1987}, mrnumber = {909387}, zbl = {0628.18006}, language = {en}, url = {http://geodesic.mathdoc.fr/item/CM_1987__63_3_409_0/} }
Ulbrich, K.-H. On cohomology of graded group categories. Compositio Mathematica, Tome 63 (1987) no. 3, pp. 409-417. http://geodesic.mathdoc.fr/item/CM_1987__63_3_409_0/