Claudia Canali José Daniel García Riccardo Lancellotti Impact of Social Networking Services on the Performance and Scalability of Web Server Infrastructures. 160-167 2008 NCA http://doi.ieeecomputersociety.org/10.1109/NCA.2008.34 conf/nca/2008 db/conf/nca/nca2008.html#CanaliGL08