FAN Yushun. Fundamentals of workflow management technology[M]. Beijing: Tsinghua University Press/Springer-Verlag, 2001: 110-169(in Chinese). [范玉顺. 工作流管理技术基础[M]. 北京: 清华大学出版社/施普林格出版社,2001: 110-169.]
[2]
LI Huifang, FAN Yushun. Managing time in workflow systems-an overview[J]. Journal of Software,2002,13(4):1552-1558(in Chinese).[李慧芳, 范玉顺. 工作流系统时间管理[J]. 软件学报,2002,13(4): 1552-1558.]