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@article{SF_1992__45_3_135195, author = {F. Oger}, title = {Finite images and elementary equivalence of completely regular inverse semigroups.}, journal = {Semigroup forum}, pages = {322--331}, publisher = {mathdoc}, volume = {45}, number = {3}, year = {1992}, zbl = {0817.20061}, url = {http://geodesic.mathdoc.fr/item/SF_1992__45_3_135195/} }
F. Oger. Finite images and elementary equivalence of completely regular inverse semigroups.. Semigroup forum, Tome 45 (1992) no. 3, pp. 322-331. http://geodesic.mathdoc.fr/item/SF_1992__45_3_135195/