M. Naaman, R. Yeh, H. Garcia-Molina, und A. Paepcke. JCDL '05: Proceedings of the 5th ACM/IEEE-CS joint conference on Digital libraries, Seite 178--187. New York, NY, USA, ACM, (2005)
C. Lin, P. Lin, P. Lu, und G. Hsieh. IEEE Transactions on Volume 12, (2008)Issue 5, Sept. 2008 Page(s): 579-586 Digital Object Identifier 10. 1109 / TITB. 2008. 917914.
C. Wang, und G. Chen. ITiCSE '04: Proceedings of the 9th annual SIGCSE conference on Innovation and technology in computer science education, 36, Seite 132--136. New York, NY, USA, ACM Press, (September 2004)