1. Shi, M.L., Xiang, Y., Yang, G.X.: Theory and Application of Computer Supported Cooperative Work. Publishing House of Electronics Industry, Beijing (2000)
2. Rama, J., Bishop, J.: 2006 Annual Research Conference of the South African Institute of Computer Scientists and Information Technologists on it Research in Developing Countries, pp. 198–205. South African Institute for Computer Scientists and Information Technologists (2006)
3. Penichet, V.M.R., Marin, I., Gallud, J.A., Lozano, M.D., Tesoriero, R.: Electronic Notes Theor. Comput. Sci. 168 (2007)
4. Chen, X.T.: M D Paper of Harbin University of Science and Technology, Harbin (2004)
5. Yang, Y.G., Cheng, W.Q.: Comput. Appl. Softw. 24 (2007)