%0 Conference Paper %B ACC'09: Proceedings of the 2009 conference on American Control Conference %D 2009 %T Observer Design for Untimed Continuous Petri Nets %A Mahulea, Cristian %A C. Seatzu %A M.P. Cabasino %A L. Recalde %A M. Silva %C St. Louis, Missouri, USA %I IEEE Press %U http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=5159893&isnumber=5159764 %8 06/2009 %@ 0743-1619