Y. Verginadis, I. Patiniotakis, N. Papageorgiou, and R. Stühmer. The Semantic Web: ESWC 2011 Workshops, volume 7117 of Lecture Notes in Computer Science, Springer Berlin / Heidelberg, 10.1007/978-3-642-25953-1_16.(2011)
K. Schmidt, R. Stühmer, and L. Stojanovic. The 2009 AAAI Spring Symposium on Intelligent Event Processing, page 67--72. Association for the Advancement of Artificial Intelligence, (March 2009)