- Maria Manuela Cruz-Cunha, João Varajão, Philip Powell, Ricardo Martinho, editors, ENTERprise Information Systems - International Conference, CENTERIS 2011, Vilamoura, Portugal, October 5-7, 2011, Proceedings, Part II. Volume 220 of Communications in Computer and Information Science, Springer, 2011.
- Maria Manuela Cruz-Cunha, João Varajão, Philip Powell, Ricardo Martinho, editors, ENTERprise Information Systems - International Conference, CENTERIS 2011, Vilamoura, Algarve, Portugal, October 5-7, 2011, Proceedings, Part I. Volume 219 of Communications in Computer and Information Science, Springer, 2011.
- Maria Manuela Cruz-Cunha, João Varajão, Philip Powell, Ricardo Martinho, editors, ENTERprise Information Systems - International Conference, CENTERIS 2011, Vilamoura, Portugal, October 5-7, 2011, Proceedings, Part III. Volume 221 of Communications in Computer and Information Science, Springer, 2011.