@article{ELMA_1971__26_141008,
     author = {E. Wittmann},
     title = {\"Uber verschwindende {Summen} von {Einheitswurzeln.}},
     journal = {Elemente der Mathematik},
     pages = {42--43},
     publisher = {mathdoc},
     volume = {26},
     year = {1971},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1971__26_141008/}
}