[1] FLECK A C. Isomorphism groups of automata[J]. Journal of the association for computing machinery,1962,9(4):469-476.
[2]ITO M. Algebraic theory of automata and languages[M]. Singapore:World Scientific Press,2004.
[3]TIAN J,ZHAO X Z. Representations of commutative asynchronous automata[J]. Journal of computer and system sciences,2012,78:504-516.
[4]TIAN J,ZHAO X Z,SHAO Y. On structure and representations of cyclic automata[J]. Theoretical computer science,2016,609:344-360.
[5]XU H,TIAN J,ZHAO X Z. Monoid-matrix type automaton[J]. Theoretical computer science,2014,520:1-10.
[6]HOWIE J M. Automata and languages[M]. Oxford:Clarendon Press,1991.