@article{MZ_1975__144_172261,
     author = {Patrick F. Smith},
     title = {Group {Rings} of {Hypercyclic} {Groups.}},
     journal = {Mathematische Zeitschrift},
     pages = {283--288},
     year = {1975},
     volume = {144},
     zbl = {0313.20016},
     url = {http://geodesic.mathdoc.fr/item/MZ_1975__144_172261/}
}