Application and theory of petri nets 1998 19th International Conference, ICATPN'98 Lisbon, Portugal, June 22-26, 1998 proceedings
ICATPN'98 (Conference) (1998 Lisbon, Portugal) Jörg Desel; Manuel Silva
Berlin Springer London c1998
Available at ICMC - Inst. Ciên. Mat. Computação (68-02 LNCS v.1420 ) and other locations(GetIt)