N. Manouselis, T. Kosmopoulos, and K. Kastrantas. 2009 International Conference on Intelligent Networking and Collaborative Systems, page 208--211. IEEE, (November 2009)
D. Dicheva, and C. Dichev. Proceedings of 2010 IEEE/WIC/ACM International Conference on Web Intelligence and Intelligent Agent Technology, page 631--638. (2010)
D. Dicheva, and C. Dichev. Proceedings of 2010 IEEE/WIC/ACM International Conference on Web Intelligence and Intelligent Agent Technology, page 631--638. (2010)