@article{MOMA_1962__66_177180,
     author = {Gert Sabidussi},
     title = {Minimal {Isthmoids.}},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {346--350},
     publisher = {mathdoc},
     volume = {66},
     year = {1962},
     zbl = {0108.18401},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1962__66_177180/}
}