author = { Bachmann, Friedrich AND Schmidt, Eckart },

title = { n-Ecke },

publisher = {Bibliogr. Inst.},

keywords = { Polygons , Set theory , Polygon },

year = {1970},

booktitle = {BI-Hochschultaschenbücher ; 471},

address = { Mannheim },

url = { http://slubdd.de/katalog?TN_libero_mab2 }