Sergey Afonin, Elena Khazova
On the Structure of Finitely Generated Semigroups of Unary Regular Languages
AFL, 2010.
@article{AFL-J-2008-AfoninK10, author = "Sergey Afonin and Elena Khazova", doi = "10.1142/S0129054110007507", journal = "{International Journal of Foundations of Computer Science}", number = 5, pages = "689--704", publisher = "{World Scientific}", title = "{On the Structure of Finitely Generated Semigroups of Unary Regular Languages}", volume = 21, year = 2010, }