@article{GDZPPN002063387, title = {Group representations without groups.}, journal = {Commentarii mathematici Helvetici}, volume = {54}, year = {1979}, pages = {240-287}, zbl = {0447.16023}, url = {http://dml.mathdoc.fr/item/GDZPPN002063387} }
Gabriel, P.; Riedtmann, Ch. Group representations without groups.. Commentarii mathematici Helvetici, Tome 54 (1979) pp. 240-287. http://gdmltest.u-ga.fr/item/GDZPPN002063387/