@article{ELMA_1957__12_140669,
     author = {E. Trost},
     title = {\"Uber eine spezielle {H\"ullkurve.}},
     journal = {Elemente der Mathematik},
     pages = {97--100},
     publisher = {mathdoc},
     volume = {12},
     year = {1957},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1957__12_140669/}
}