José Cordeiro Slimane Hammoudi Joaquim Filipe Web Information Systems and Technologies, 4th International Conference, WEBIST 2008, Funchal, Madeira, Portugal, May 4-7, 2008, Revised Selected Papers 18 http://dx.doi.org/10.1007/978-3-642-01344-7 2009 978-3-642-01343-0 WEBIST (Selected Papers) Lecture Notes in Business Information Processing Springer db/conf/webist/webist2008sp.html