@article{01479891, title = {The low-dimensional homology of crossed modules.}, journal = {Homology, Homotopy and Applications}, volume = {2}, year = {2000}, pages = {41-50}, zbl = {0972.18004}, language = {en}, url = {http://dml.mathdoc.fr/item/01479891} }
Gilbert, N.D. The low-dimensional homology of crossed modules.. Homology, Homotopy and Applications, Tome 2 (2000) pp. 41-50. http://gdmltest.u-ga.fr/item/01479891/