1. Instant messaging and trashing google;Arrington,2006
2. An examination into MSN Messenger 7.5 contact identification;Dickson;Digit Investig,2006
3. MSN Messenger most used IM client;Mook,2006
4. Operating system market share for April, 2007;MarketShare.com,2007
5. MSN Messenger protocol, general – HTTP connections;Mintz,2004