## The maximal subsemigroups of semigroups of transformations preserving or reversing the orientation on a finite chain

- Citation:
- Dimitrova, I., Vítor H. Fernandes, and J. Koppitz. "The maximal subsemigroups of semigroups of transformations preserving or reversing the orientation on a finite chain." Publicationes Mathematicae Debrecen. 81.1-2 (2012): 11-29.