S. Hellmann, J. Lehmann, and S. Auer. Learning of OWL Class Expressions on Very Large Knowledge Bases and its Applications, chapter 5, IGI Global, (2011)
S. Hellmann, J. Lehmann, and S. Auer. EKAW 2012, Springer, (2012)published at EKAW, preprint: http://svn.aksw.org/papers/2012/NIF/EKAW_short_paper/public.pdf.
C. Guéret, P. Groth, C. Stadler, and J. Lehmann. Proceedings of the 9th Extended Semantic Web Conference, volume 7295 of Lecture Notes in Computer Science, page 87--102. Springer, (2012)
S. Auer, M. Weidl, J. Lehmann, A. Zaveri, and K. Choi. Proceedings of the 9th International Semantic Web Conference (ISWC2010), Berlin / Heidelberg, Springer, (2010)