Lucia Pomello Grzegorz Rozenberg Carla Simone A survey of equivalence notions for net based systems. 410-472 1992 conf/apn/1992d Advances in Petri Nets: The DEMON Project db/conf/apn/apndemon92.html#PomelloRS92 http://dx.doi.org/10.1007/3-540-55610-9_180