Synhronic distances in C/E systems. - Yuan Chong-Yi (Applications and Theory in Petri Nets, 1985)

Process periods and system reconstruction. - Yuan Chong-Yi (Applications and Theory in Petri Nets, 1985)

Synchronic structure - a tutorial. - Ursula Goltz; Yuan Chong-Yi (Applications and Theory in Petri Nets, 1985)