Voir la notice de l'article provenant de la source Hellenic Digital Mathematics Library
@article{MR_1994__41_a0, author = {George Danas}, title = {Crossed modules, {Crossed} n-fold extension of groups and {Cohomology} theory in {Abstract} {Categories}}, journal = {M\ensuremath{\alpha}\ensuremath{\theta}\ensuremath{\eta}\ensuremath{\mu}\ensuremath{\alpha}\ensuremath{\tau}\ensuremath{\iota}\ensuremath{\kappa}\ensuremath{\acute\eta} E\ensuremath{\pi}\ensuremath{\iota}\ensuremath{\theta}\ensuremath{\varepsilon}\ensuremath{\acute\omega}\ensuremath{\rho}\ensuremath{\eta}\ensuremath{\sigma}\ensuremath{\eta} }, pages = {3-27}, publisher = {mathdoc}, volume = {41}, year = {1994}, language = {gr}, url = {http://geodesic.mathdoc.fr/item/MR_1994__41_a0/} }
George Danas. Crossed modules, Crossed n-fold extension of groups and Cohomology theory in Abstract Categories. Μαθηματική Επιθεώρηση , Tome 41 (1994), p. 3-27. http://geodesic.mathdoc.fr/item/MR_1994__41_a0/