H. Yoon, E. Kim, M. Lee, J. Lee, und T. Gatton. Information Security and Assurance, 2008. ISA 2008. International Conference on, Seite 332-337. (April 2008)
O. Park, und J. Lee. Handbook of research for educational communications and technology, Kapitel 25, Lawrence Erlbaum, Mahwah, N.J., 2nd edition Edition, (2004)
L. Spector. Proceedings of the Genetic and Evolutionary
Computation Conference (GECCO-2001), Seite 137--146. San Francisco, California, USA, Morgan Kaufmann, (7-11 July 2001)
O. Park, und J. Lee. Handbook of research for educational communications and technology, Kapitel 25, Lawrence Erlbaum, Mahwah, N.J., 2nd edition Edition, (2004)