Viliam Geffert. An alternating hierarchy for finite automata. Theoretical Computer Science, 445:1-24, 2012. [doi]
@article{Geffert12, title = {An alternating hierarchy for finite automata}, author = {Viliam Geffert}, year = {2012}, doi = {10.1016/j.tcs.2012.04.044}, url = {http://dx.doi.org/10.1016/j.tcs.2012.04.044}, researchr = {https://researchr.org/publication/Geffert12}, cites = {0}, citedby = {0}, journal = {Theoretical Computer Science}, volume = {445}, pages = {1-24}, }