Voir la notice de l'article provenant de la source Hellenic Digital Mathematics Library
@article{MR_1994__41_a2, author = {George Danas}, title = {The {Obstruction} theory of {Group} {Extensions} and {H^3(Q,} {A)} 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 = {45-55}, publisher = {mathdoc}, volume = {41}, year = {1994}, language = {gr}, url = {http://geodesic.mathdoc.fr/item/MR_1994__41_a2/} }
George Danas. The Obstruction theory of Group Extensions and H^3(Q, A) in Abstract Categories. Μαθηματική Επιθεώρηση , Tome 41 (1994), p. 45-55. http://geodesic.mathdoc.fr/item/MR_1994__41_a2/