Finite State Machines (fsm) http://ai-depot.com/finitestatemachines/fsm.html
Finite State Machine EmulaTorshttp: //courses.cs.vt.edu/~cs1104/fsm/fsm.overview.html
Finite State Machine Designhttp://www2.ele.ufes.br/~ailson/digital2/cld/chapter8/chapter08.doc.html
