R. Krebs, A. Wert, and S. Kounev. Proceedings of the 13th International Conference on Web Engineering (ICWE 2013), Aalborg University, Denmark, Springer-Verlag, (July 2013)
F. Brosig. volume 275 of Electronic Notes in Theoretical Computer Science, Amsterdam, The Netherlands, Elsevier Science Publishers B. V., (September 2011)