@article {258, title = {Properties and Performance Bounds for Timed Marked Graphs}, journal = {IEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications}, volume = {39}, year = {1992}, month = {05/1992}, pages = {386-401}, issn = {1057-7122}, url = {http://webdiis.unizar.es/CRPetri/papers/jcampos/92_CCCS_CAS.ps.gz}, author = {J. Campos and G. Chiola and J.M. Colom and M. Silva} }