Raymond B. Jennings III Erich M. Nahum David P. Olshefski Debanjan Saha Zon-Yin Shae Chris Waters A study of Internet instant messaging and chat protocols. 16-21 2006 20 IEEE Network 4 http://dx.doi.org/10.1109/MNET.2006.1668399 db/journals/network/network20.html#JenningsNOSSW06