Burkhard Stiller, David Hausheer: State-of-the-Art in Economic Management of Internet Services; "Handbook of Network and System Administration", Elsevier, in: Jan Bergstra, Mark Burgess (Eds.), ISBN: 978-0-444-52198-9, November 2007, URL: http://www.elsevier.com/wps/find/bookdescription.cws_home/713461/description.