@article{ELMA_1962__17_140751,
     author = {Kuno Fladt},
     title = {Das {Keplersche} {Ei.}},
     journal = {Elemente der Mathematik},
     pages = {73--78},
     year = {1962},
     volume = {17},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1962__17_140751/}
}