Sergio Valerio Jean Pereira Leonel Morgado Pedro Mestre Carlos Serôdio Fausto de Carvalho Second Life Information Desk System Using Instant Messaging and Short Messaging Service Technologies. 125-132 2009 VS-GAMES http://doi.ieeecomputersociety.org/10.1109/VS-GAMES.2009.13 conf/vsgames/2009 db/conf/vsgames/vsgames2009.html#ValerioPMMSC09