M. Mohsen, Z. Zainol, R. Salam, and W. Husain. International Conference on Computational Intelligence, page 97-100. International Computational Intelligence Society, (2004)
S. ur Rahman, N. Aoumeur, and G. Saake. iiWAS '08: Proceedings of the 10th International Conference on Information Integration and Web-based Applications & Services, page 240--247. New York, NY, USA, ACM, (2008)