@book{ title = "Polaris", author = "Ulrich, Hans,Rottensteiner, Franz", year = "1974", publisher = "Insel-Verl.", address = "Frankfurt am Main", edition = "11. - 18. Tsd.", title = "ein Science-fiction-Almanach", language = "ger", howpublished = "print", isbn = "3458017305", series = "Insel-Taschenbuch, 30", }