@article {MR1428189,
	title = {Semigroups of order preserving mappings on a finite chain: a new class of divisors},
	journal = {Semigroup Forum},
	volume = {54},
	number = {2},
	year = {1997},
	pages = {230{\textendash}236},
	issn = {0037-1912},
	doi = {10.1007/BF02676604},
	url = {http://dx.doi.org/10.1007/BF02676604},
	author = {Fernandes, Vitor H.}
}
