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@article{MAN_1966__166_161457, author = {G.W. MACKEY}, title = {Ergodic {Theory} and {Virtual} {Groups.}}, journal = {Mathematische Annalen}, pages = {187--207}, publisher = {mathdoc}, volume = {166}, year = {1966}, zbl = {0178.38802}, url = {http://geodesic.mathdoc.fr/item/MAN_1966__166_161457/} }
G.W. MACKEY. Ergodic Theory and Virtual Groups.. Mathematische Annalen, Tome 166 (1966), pp. 187-207. http://geodesic.mathdoc.fr/item/MAN_1966__166_161457/