G. Vulcu, W. Derguech, and S. Bhiri. Business Process Management Workshops, volume 66 of Lecture Notes in Business Information Processing, Springer, Berlin, (2011)
P. Rangel, J. Carvalho Junior, M. Ramirez, and J. de Souza. Proceedings of the Sixth International Conference on Intelligent Environments (IE 2010), Kuala Lumpur, Malaysia, page 116--121. Los Alamitos, CA, IEEE Computer Society CPS, (2010)