1. Lecture Notes in Computer Science;D.W. Archer,2008
2. Lecture Notes in Computer Science;P. Brusilovsky,2008
3. Lecture Notes in Computer Science;P. Brusilovsky,2004
4. Cassel, L.N., Davies, G., Fone, W., Hacquebard, A., Impagliazzo, J., LeBlanc, R., Little, J.C., McGettrick, A., Pedrona, M.: The computing ontology: application in education. In: Working Group Reports of Innovation and Technology in CS Education, pp. 171–183 (2007)
5. Delcambre, L.M.L., Maier, D., Bowers, S., Weaver, M., Longxing, D., Gorman, P., Ash, J., Lavelle, M., Lyman, J.: Bundles in Captivity: An Application of Superimposed Information. In: Proc. of 17th International Conference on Data Engineering, pp. 88–99. Springer, Rome (2001)