D. C. Cooper. Sequential Machines and Automata Theory. Comput. J., 11(2):176, 1968. [doi]
@article{Cooper68a, title = {Sequential Machines and Automata Theory}, author = {D. C. Cooper}, year = {1968}, doi = {10.1093/comjnl/11.2.176}, url = {https://doi.org/10.1093/comjnl/11.2.176}, researchr = {https://researchr.org/publication/Cooper68a}, cites = {0}, citedby = {0}, journal = {Comput. J.}, volume = {11}, number = {2}, pages = {176}, }