B. Hecht, and D. Gergle. Proceedings of the SIGCHI Conference on Human Factors in Computing Systems (CHI '10), Atlanta, GA, USA, page 291--300. New York, ACM, (2010)
F. Ferri, P. Grifoni, and S. Paolozzi. Knowledge-Based Intelligent Information and Engineering Systems: KES 2007 -- WIRN 2007, 11th International Conference, KES 2007, XVII Italian Workshop on Neural Networks, Vietri sul Mare, Italy, volume 4693 of Lecture Notes in Artificial Intelligence, Springer, Berlin, (2007)