Sebastian Link Henri Prade Foundations of Information and Knowledge Systems, 6th International Symposium, FoIKS 2010, Sofia, Bulgaria, February 15-19, 2010. Proceedings 5956 2010 http://dx.doi.org/10.1007/978-3-642-11829-6 978-3-642-11828-9 FoIKS Lecture Notes in Computer Science Springer db/conf/foiks/foiks2009.html