Unforced Continuous Petri Nets and Positive Systems.

Manuel Silva Laura Recalde Unforced Continuous Petri Nets and Positive Systems. 55-62 2003 conf/posta/2003 POSTA http://springerlink.metapress.com/openurl.asp?genre=article&id=DRFG1WNJJEQ418VH db/conf/posta/posta2003.html#SilvaR03