@article{10_4064_cm_57_2_307_317,
     author = {Karl-Goswin Grosse-Erdmann},
     title = {An extension of the {Steinhaus-Weil} theorem},
     journal = {Colloquium Mathematicum},
     pages = {307--317},
     publisher = {mathdoc},
     volume = {57},
     number = {2},
     year = {1989},
     doi = {10.4064/cm-57-2-307-317},
     language = {de},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-57-2-307-317/}
}