@article {MR1842509,
	title = {A division theorem for the pseudovariety generated by semigroups of orientation preserving transformations on a finite chain},
	journal = {Comm. Algebra},
	volume = {29},
	number = {1},
	year = {2001},
	pages = {451{\textendash}456},
	issn = {0092-7872},
	doi = {10.1081/AGB-100000811},
	url = {http://dx.doi.org/10.1081/AGB-100000811},
	author = {Fernandes, Vitor H.}
}
