Paolo Baldan Nadia Busi Andrea Corradini G. Michele Pinna Domain and event structure semantics for Petri nets with read and inhibitor arcs. 129-189 2004 323 Theor. Comput. Sci. 1-3 http://dx.doi.org/10.1016/j.tcs.2004.04.001 db/journals/tcs/tcs323.html#BaldanBCP04