1. “A Machine-Independent Theory of the Complexity of Recursive Functions,”;Blum;J. Assoc. Comp. Mach.,1967
2. “Decomposition of Linear Sequential Machines,”;Gallaire;Math. System Theory,1970
3. Algebraic Structure Theory of Sequential Machines;Hartmanis,1966
4. Studies in Feedback Shift Register Synthesis of Sequential Machines;Martin,1968
5. Perceptrons;Minsky,1969