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@article{SF_1996__53_2_135498, author = {A. Solomon}, title = {Catalan monoids, monoids of local endomorphisms, and their presentations.}, journal = {Semigroup forum}, pages = {351--368}, publisher = {mathdoc}, volume = {53}, number = {2}, year = {1996}, zbl = {0862.20049}, url = {http://geodesic.mathdoc.fr/item/SF_1996__53_2_135498/} }
A. Solomon. Catalan monoids, monoids of local endomorphisms, and their presentations.. Semigroup forum, Tome 53 (1996) no. 2, pp. 351-368. http://geodesic.mathdoc.fr/item/SF_1996__53_2_135498/