@article{AM2_1997__54_3_137699,
     author = {Wolfgang Schuster},
     title = {Quadratische {Identit\"aten} bei {Polygonen.}},
     journal = {Aequationes mathematicae},
     pages = {117--143},
     publisher = {mathdoc},
     volume = {54},
     number = {3},
     year = {1997},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/AM2_1997__54_3_137699/}
}