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@article{SF_1997__54_2_135522, author = {V.H. Fernandes}, title = {Semigroups of order preserving mappings on a finite chain: a new class of divisors.}, journal = {Semigroup forum}, pages = {230--236}, publisher = {mathdoc}, volume = {54}, number = {2}, year = {1997}, zbl = {0868.20049}, url = {http://geodesic.mathdoc.fr/item/SF_1997__54_2_135522/} }
V.H. Fernandes. Semigroups of order preserving mappings on a finite chain: a new class of divisors.. Semigroup forum, Tome 54 (1997) no. 2, pp. 230-236. http://geodesic.mathdoc.fr/item/SF_1997__54_2_135522/