@article{CTGDC_2003__44_4_247_0, author = {Garz\'on, B. A. R. and del Rio, A.}, title = {Low-dimensional cohomology for categorical groups}, journal = {Cahiers de Topologie et G\'eom\'etrie Diff\'erentielle Cat\'egoriques}, volume = {44}, year = {2003}, pages = {247-280}, mrnumber = {2030048}, zbl = {1042.18006}, language = {en}, url = {http://dml.mathdoc.fr/item/CTGDC_2003__44_4_247_0} }
Garzón, B. A. R.; del Rio, A. Low-dimensional cohomology for categorical groups. Cahiers de Topologie et Géométrie Différentielle Catégoriques, Tome 44 (2003) pp. 247-280. http://gdmltest.u-ga.fr/item/CTGDC_2003__44_4_247_0/
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