Li Pan Weidong Zhao Zhicheng Wang Gang Wei Shumei Wang On Computation Complexity of the Concurrently Enabled Transition Set Problem. 222-233 2007 conf/tamc/2007 TAMC http://dx.doi.org/10.1007/978-3-540-72504-6_20 db/conf/tamc/tamc2007.html#PanZWWW07