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@article{SF_1984__30_134726, author = {M.A. Reynolds}, title = {A new construction for free inverse semigroups.}, journal = {Semigroup forum}, pages = {291--296}, publisher = {mathdoc}, volume = {30}, year = {1984}, zbl = {0535.20035}, url = {http://geodesic.mathdoc.fr/item/SF_1984__30_134726/} }
M.A. Reynolds. A new construction for free inverse semigroups.. Semigroup forum, Tome 30 (1984), pp. 291-296. http://geodesic.mathdoc.fr/item/SF_1984__30_134726/