@article{05375033, title = {Cohomology groups of a groupoid.}, journal = {Acta Universitatis Apulensis. Mathematics - Informatics}, volume = {11}, year = {2006}, pages = {109-114}, zbl = {1153.20313}, language = {en}, url = {http://dml.mathdoc.fr/item/05375033} }
Wainberg, Dorin. Cohomology groups of a groupoid.. Acta Universitatis Apulensis. Mathematics - Informatics, Tome 11 (2006) pp. 109-114. http://gdmltest.u-ga.fr/item/05375033/