C. Stadler, M. Martin, J. Lehmann, and S. Hellmann. 6th Workshop on Scripting and Development for the Semantic Web Colocated with ESWC 2010 30th or 31st May, 2010 Crete, Greece, (2010)
S. Hellmann, J. Lehmann, S. Auer, and M. Nitzschke. EKAW, page 446-449. (2012)published at EKAW, preprint http://jens-lehmann.org/files/2012/ekaw_nif_combinator.pdf.
S. Hellmann, C. Stadler, J. Lehmann, and S. Auer. Proc. of 8th International Conference on Ontologies, DataBases, and Applications of Semantics (ODBASE), volume 5871 of Lecture Notes in Computer Science, page 1209--1223. (2009)
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. Proceedings of the Poster and Demonstration Session at the 7th International Semantic Web Conference (ISWC2008), Karlsruhe, Germany, October 28, 2008, volume 401 of CEUR Workshop Proceedings, CEUR-WS.org, (2008)
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.