V. Antonellis, M. Melchiori, and D. Bianchini. CAiSE Workshops (3), page 153-164. Faculty of Computer Science and Information Technology, Riga Technical University, Riga, Latvia, (2004)
D. Bianchini, F. Pagliarecci, and L. Spalazzi. Formal Modeling: Actors, Open Systems, Biological Systems, volume 7000 of Lecture Notes in Computer Science, page 223-240. Springer, (2011)