@article{MOMA_1966__70_177343,
     author = {Erich Frisch},
     title = {Spiegelung am parabolischen {Zylinder.}},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {315--326},
     publisher = {mathdoc},
     volume = {70},
     year = {1966},
     zbl = {0142.17903},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1966__70_177343/}
}