@book{Ma93, author = {Rudolf Mathar}, title = "Informationstheorie, Vorlesungsskript in der Reihe Aachener Beitr{\"a}ge zur Mathematik", pages = "88", publisher = "Verlag der Augustinus Buchhandlung", series = "Band 9", address = "Aachen", ISBN = "3-86073-113-0", year = 1993, hsb = {RWTH-2018-222293}, }