K.Ramya, S. Rajakumari, und D. Nalini. International Journal on Recent and Innovation Trends in Computing and Communication, 3 (3):
1338--1343(März 2015)
V. Lavrenko, J. Allan, E. DeGuzman, D. LaFlamme, V. Pollard, und S. Thomas. Proceedings of the second international conference on Human Language Technology Research, Seite 115--121. San Francisco, CA, USA, Morgan Kaufmann Publishers Inc., (2002)
M. Montagnuolo, M. Ferri, und A. Messina. HT '09: Proceedings of the Twentieth ACM Conference on Hypertext and Hypermedia, New York, NY, USA, ACM, (Juli 2009)