@article{ELMA_1972__27_141037,
     author = {J.E. Hofmann},
     title = {\"Uber {Kreisbogenvierecke.}},
     journal = {Elemente der Mathematik},
     pages = {1--4},
     publisher = {mathdoc},
     volume = {27},
     year = {1972},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1972__27_141037/}
}