@article{AIHPA_1969__10_3_229_0,
     author = {Edwards, C. M.},
     title = {$C^\ast $-algebras of central group extensions {I}},
     journal = {Annales de l'I.H.P. Physique th\'eorique},
     pages = {229--246},
     publisher = {Gauthier-Villars},
     volume = {10},
     number = {3},
     year = {1969},
     mrnumber = {248284},
     zbl = {0175.14003},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AIHPA_1969__10_3_229_0/}
}