Yechezkel Zalcstein. Group-Complexity and Reversals of Finite Semigroups. Theory Comput. Syst., 8(3):235-242, 1975.
@article{Zalcstein75, title = {Group-Complexity and Reversals of Finite Semigroups}, author = {Yechezkel Zalcstein}, year = {1975}, researchr = {https://researchr.org/publication/Zalcstein75}, cites = {0}, citedby = {0}, journal = {Theory Comput. Syst.}, volume = {8}, number = {3}, pages = {235-242}, }