- George A. Tsihrintzis, Maria Virvou, Toyohide Watanabe, Lakhmi C. Jain, Robert J. Howlett, editors, Intelligent Interactive Multimedia Systems and Services - Proceedings of the 6th International Conference on Intelligent Interactive Multimedia Systems and Services, IIMSS 2013, Sesimbra, Portugal, 26-28 June 2013. Volume 254 of Frontiers in Artificial Intelligence and Applications, IOS Press, 2013.