OUYANG Yu, LIU Yushu. Verification of workflow authorization reasonability based on business instance decomposition[J]. Computer Integrated Manufacturing Systems, 2006, 12(5): 697-701(in Chinese).[欧阳昱,刘玉树.基于实例分解的工作流授权合理性验[J].计算机集成制造系统,2006,12(5):697-701.]
[2]
CRAMPTON J. On the satisfiability of constraints in workflow systems[EB/OL].(2004-05-24)[2006-11-12]. http://www. rhul. ac. uk/ mathematics/techreports.