6HAREL D. Statecharts.. a visual formalism for complex systems[J]. Science of Computer Programming, 1987, 8:231-274.
7JILLES van Gurp, JAN Bosch. On the implementation of finite state machines [A]. Proceedings of the IASTED International Conference, 3rd Annual lASTED International Conference Software Engineering and Applications[C]. Scottsdale, Arizona:IASTED 1999.
8GAMMA E, HELM R, JOHNSON R, et al. Design Patterns-Elements of Reusable Object Oriented software [M]. Boston: Addison Wesley, 1995.
9ROBERTS D, JOHNSON R. Patterns for evolving frameworks [A]. Pattern Languages of Program Design 3[C]. Boston: Addison Wesley, 1998.
10SCHMIDT D C. Reactor: an object behavior pattern for concurrent event dmultiplexing and event handler dispatching [A]. Proceedings of the First Pattern Languages of Programs conference [C]. Monticello, Illinois: Addison-Wesley, 1995.
