中国科学院数学与系统科学研究院期刊网
SOME APPLICATIONS OF GRAPH THEORY APPROACH TO THE STUDY OF DISCRETE-EVENT DYNAMIC SYSTEMS
CAI MAO-CHENG;TIAN FENG;MA ZHONG-FAN
Journal of Systems Science and Mathematical Sciences . 1995, (3): 208 -211 .  DOI: 10.12341/jssms09152