S. Angelov, P. Grefen, and D. Greefhorst. Joint Working IEEE/IFIP Conference on Software Architecture, 2009 & European Conference on Software Architecture. WICSA/ECSA 2009, page 141--150. IEEE, (September 2009)
M. Granitzer, M. Hristakeva, R. Knight, K. Jack, and R. Kern. Proceedings of the 2nd International Conference on Web Intelligence, Mining and Semantics, page 19:1--19:8. New York, NY, USA, ACM, (2012)