1. Equivalent sequential circuits;Cadden;IRE Trans. on Circuit Theory,1959
2. Comparison of finite-state models;Gill;IRE Trans. on Circuit Theory,1960
3. On the length of the smallest uniform experiment which distinguishes the terminal states of a machine;Ginsburg;J. Computing Mach.,1958
4. A method for synthesizing sequential circuits;Mealy;Bell System Tech. J.,1955
5. Gedanken-experiments on sequential machines;Moore,1956