@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/}
}