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@article{SF_1989__38_2_134968, author = {Gerard Lallement}, title = {Languages recognized by programs over the two-element monoid.}, journal = {Semigroup forum}, pages = {371--374}, publisher = {mathdoc}, volume = {38}, number = {2}, year = {1989}, zbl = {0668.20045}, url = {http://geodesic.mathdoc.fr/item/SF_1989__38_2_134968/} }
Gerard Lallement. Languages recognized by programs over the two-element monoid.. Semigroup forum, Tome 38 (1989) no. 2, pp. 371-374. http://geodesic.mathdoc.fr/item/SF_1989__38_2_134968/