Chung Laung Liu. kth-Order Finite Automaton. IEEE Transactions on Computers, 12(5):470-475, 1963. [doi]
@article{Liu63-1,
title = {kth-Order Finite Automaton},
author = {Chung Laung Liu},
year = {1963},
doi = {10.1109/PGEC.1963.263628},
url = {http://dx.doi.org/10.1109/PGEC.1963.263628},
researchr = {https://researchr.org/publication/Liu63-1},
cites = {0},
citedby = {0},
journal = {IEEE Transactions on Computers},
volume = {12},
number = {5},
pages = {470-475},
}