@article{MZ_1979__169_172894,
     author = {Martin Huber},
     title = {On {Cartesian} {Powers} of a {Rational} {Group.}},
     journal = {Mathematische Zeitschrift},
     pages = {253--260},
     publisher = {mathdoc},
     volume = {169},
     year = {1979},
     zbl = {0403.20034},
     url = {http://geodesic.mathdoc.fr/item/MZ_1979__169_172894/}
}