@article{GDZPPN002316749, title = {Crossed Products of Communtation Systems.}, journal = {Mathematische Annalen}, volume = {243}, year = {1979}, pages = {7-20}, zbl = {0389.46046}, url = {http://dml.mathdoc.fr/item/GDZPPN002316749} }
Rousseau, R.; Daele, A. van. Crossed Products of Communtation Systems.. Mathematische Annalen, Tome 243 (1979) pp. 7-20. http://gdmltest.u-ga.fr/item/GDZPPN002316749/