@article{MOMA_1959__63_177069,
     author = {W. Wunderlich},
     title = {\"Aquidistante {Paare} ebener {Kurven} mit konstanter {Schr\"ankung.}},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {271--276},
     publisher = {mathdoc},
     volume = {63},
     year = {1959},
     zbl = {0088.13902},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1959__63_177069/}
}