Roberto Bruni Hernán C. Melgratti Emilio Tuosto Translating Orc Features into Petri Nets and the Join Calculus. 123-137 2006 conf/wsfm/2006 WS-FM http://dx.doi.org/10.1007/11841197_8 db/conf/wsfm/wsfm2006.html#BruniMT06