Zhigeng Pan Xiaopeng Zhang Abdennour El Rhalibi Woontack Woo Yi Li Technologies for E-Learning and Digital Entertainment, Third International Conference, Edutainment 2008, Nanjing, China, June 25-27, 2008, Proceedings 5093 2008 978-3-540-69734-3 Edutainment Lecture Notes in Computer Science Springer db/conf/edutainment/edutainment2008.html