M. Schranz, S. Dustdar: "Multimedia News Systems"; in: "Encyclopedia of Multimedia, 2nd Edition", 2nd Edition; B. Furht (ed.); Springer, Boston, MA, 2008, (invited), ISBN: 978-0-387-74724-8, 575 - 581.
http://dx.doi.org/10.1007/978-0-387-78414-4