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@article{MS2_1991__68_1_167154, author = {Soren Jondrup and Anders Jensen}, title = {Smash products, group actions and group graded rings.}, journal = {Mathematica Scandinavica}, pages = {161--170}, publisher = {mathdoc}, volume = {68}, number = {1}, year = {1991}, zbl = {0724.16020}, url = {http://geodesic.mathdoc.fr/item/MS2_1991__68_1_167154/} }
Soren Jondrup; Anders Jensen. Smash products, group actions and group graded rings.. Mathematica Scandinavica, Tome 68 (1991) no. 1, pp. 161-170. http://geodesic.mathdoc.fr/item/MS2_1991__68_1_167154/