R. Kern, C. Körner, and M. Strohmaier. Proceedings of the 14th European conference on Research and advanced technology for digital libraries, page 461--465. Berlin, Heidelberg, Springer-Verlag, (2010)
R. Kern, C. Körner, and M. Strohmaier. Proceedings of the 14th European conference on Research and advanced technology for digital libraries, page 461--465. Berlin, Heidelberg, Springer-Verlag, (2010)