M. Soffner, N. Siegmund, M. Pukall, и V. Köppen. Grundlagen von Datenbanken, том CS-02-09 из Preprints aus dem Institut für Informatik, стр. 51-55. Universität Rostock, (2009)
S. ur Rahman, M. Rosenmüller, N. Siegmund, G. Saake, и S. Apel. EDACS '09: 20th International Workshop on Database and Expert Systems Application (DEXA 2009), стр. 9--13. ISBN: 978-0-7695-3763-4, IEEE Computer Society, (2009)
S. Sunkle, M. Rosenmüller, N. Siegmund, S. ur Rahman, G. Saake, и S. Apel. Workshop on Modularization, Composition, and Generative Techniques for Product Line Engineering, MIP-0802, стр. 27--34. Department of Informatics and Mathematics, University of Passau, (октября 2008)
M. Rosenmüller, N. Siegmund, S. ur Rahman, и C. Kästner. Proceedings of the GPCE Workshop on Modularization, Composition and Generative Techniques for Product Line Engineering (McGPLE), MIP-0802, стр. 13--18. Department of Informatics and Mathematics, University of Passau, (октября 2008)