Stijn Heymans, Thomas Eiter, and Guohui Xiao. Proc. of 19th European Conference on Artificial Intelligence ECAI, volume 215 of Frontiers in Artificial Intelligence and Applications, page 35--40. IOS Press, (2010)
Stijn Heymans, Thomas Eiter, and Guohui Xiao. Proc. of 19th European Conference on Artificial Intelligence ECAI, volume 215 of Frontiers in Artificial Intelligence and Applications, page 35--40. IOS Press, (2010)