http://www.earthtimes.org/articles/show/edigital-files-patent-infringement-lawsuit,1025685.shtml
http://www.newstin.com/tag/us/154613821
http://www.reuters.com/finance/stocks/keyDevelopments?rpc=66&symbol=NOK×tamp=20091103133000
http://www.silobreaker.com/briefedigital-files-patent-infringement-lawsuit-against-19-cos-5_2262714528175226888
http://www.finanznachrichten.de/nachrichten-2009-11/15368594-brief-e-digital-files-patent-infringement-lawsuit-against-19-cos-020.htm Germany