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@article{SF_1992__45_3_135191, author = {G.M.S. Gomes and J.M. Howie}, title = {On the ranks of certain semigroups of order-preserving transformations.}, journal = {Semigroup forum}, pages = {272--282}, publisher = {mathdoc}, volume = {45}, number = {3}, year = {1992}, zbl = {0769.20029}, url = {http://geodesic.mathdoc.fr/item/SF_1992__45_3_135191/} }
G.M.S. Gomes; J.M. Howie. On the ranks of certain semigroups of order-preserving transformations.. Semigroup forum, Tome 45 (1992) no. 3, pp. 272-282. http://geodesic.mathdoc.fr/item/SF_1992__45_3_135191/