@article{ELMA_1961__16_140727,
     author = {Gerhard Geise},
     title = {\"Uber {Aufsatzdreiecke.}},
     journal = {Elemente der Mathematik},
     pages = {73--78},
     year = {1961},
     volume = {16},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1961__16_140727/}
}