@article{MAN_1992__292_2_164902,
     author = {Siegfried Echterhoff},
     title = {The primitive ideal space of twisted covariant systems with continuously varying stabilizers.},
     journal = {Mathematische Annalen},
     pages = {59--84},
     publisher = {mathdoc},
     volume = {292},
     number = {2},
     year = {1992},
     zbl = {0739.22006},
     url = {http://geodesic.mathdoc.fr/item/MAN_1992__292_2_164902/}
}