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@article{SF_1986__35_134856, author = {J.E. Pin}, title = {A property of the {Sch\"utzenberger} product.}, journal = {Semigroup forum}, pages = {53--62}, publisher = {mathdoc}, volume = {35}, year = {1986}, zbl = {0618.20040}, url = {http://geodesic.mathdoc.fr/item/SF_1986__35_134856/} }
J.E. Pin. A property of the Schützenberger product.. Semigroup forum, Tome 35 (1986), pp. 53-62. http://geodesic.mathdoc.fr/item/SF_1986__35_134856/