Jia-Yan Yao. Opacity of a finite automaton, method of calculation and the Ising chain. Discrete Applied Mathematics, 125(2-3):289-318, 2003.
@article{Yao03, title = {Opacity of a finite automaton, method of calculation and the Ising chain}, author = {Jia-Yan Yao}, year = {2003}, researchr = {https://researchr.org/publication/Yao03}, cites = {0}, citedby = {0}, journal = {Discrete Applied Mathematics}, volume = {125}, number = {2-3}, pages = {289-318}, }