1. Bauters, K., Janssen, J., Schockaert, S., Vermeir, D., De Cock, M.: Communicating answer set programs. In: Tech. Comm. of ICLP 2010, vol. 7, pp. 34–43 (2010)
2. Brain, M., De Vos, M.: Implementing OCLP as a front-end for answer set solvers: From theory to practice. In: Proc. of ASP 2005 (2003)
3. Brewka, G., Eiter, T.: Equilibria in heterogeneous nonmonotonic multi-context systems. In: Proc. of AAAI 2007, pp. 385–390 (2007)
4. Brewka, G., Roelofsen, F., Serafini, L.: Contextual default reasoning. In: Proc. of. IJCAI 2007, pp. 268–273 (2007)
5. Lecture Notes in Computer Science;F. Buccafurri,2008