R. Kern, C. Korner, and M. Strohmaier. Research and Advanced Technology for Digital Libraries, volume 6273 of Lecture Notes in Computer Science, Springer Berlin Heidelberg, (2010)
V. Dimitrieski, M. Čeliković, N. Igić, H. Kern, and F. Stefan. Intelligent Software Methodologies, Tools and Techniques, volume 532 of Communications in Computer and Information Science, Springer International Publishing, (2015)