@article{01247811, title = {Crossed semimodules and Schreier internal categories in the category of monoids.}, journal = {Georgian Mathematical Journal}, volume = {5}, year = {1998}, pages = {575-581}, doi = {10.1023/B:GEOR.0000008133.94825.60}, zbl = {0915.18002}, language = {en}, url = {http://dml.mathdoc.fr/item/01247811} }
Patchkoria, A. Crossed semimodules and Schreier internal categories in the category of monoids.. Georgian Mathematical Journal, Tome 5 (1998) pp. 575-581. doi : 10.1023/B:GEOR.0000008133.94825.60. http://gdmltest.u-ga.fr/item/01247811/