1. Introduction to the Theory of Finite-State Machines;Gill,1962
2. The synthesis of sequential switching circuits;Huffmann;J. Franklin Inst.,1954
3. The synthesis of sequential switching circuits;Huffmann;J. Franklin Inst.,1954
4. A method for synthesizing sequential circuits;Mealy;Bell System Tech. J.,1955
5. Feedback theory—some properties of signal flow graphs;Mason,1956