@inproceedings {SiTe-SMC98, title = {DEDS Along Their Life-Cycle: Interpreted Extensions of Petri Nets}, booktitle = {IEEE International Conference on Systems, Man and Cybernetics}, year = {1998}, note = {Keynote}, month = {1998}, publisher = {IEEE}, organization = {IEEE}, type = {Keynote}, address = {La Jolla, San Diego}, keywords = {Keynote}, author = {M. Silva and E. Teruel} }