@book{id_10025, author = "Weber, Eduard von", title = "Bilinearformen und Differentialsysteme", year = "1899", address = "München", publisher = "Verl.d.K.Akad.", series = "Sitzungsbericht der Bayerischen Akademie der Wissenschaften", volume = "1899,11.", url = "http://publikationen.badw.de/de/003391855", }