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@article{SF_1980__19_134388, author = {J.M. Lord}, title = {A projective limit characterization of {GIF} semigroups with an {N-congruence.}}, journal = {Semigroup forum}, pages = {267--282}, publisher = {mathdoc}, volume = {19}, year = {1980}, zbl = {0431.20050}, url = {http://geodesic.mathdoc.fr/item/SF_1980__19_134388/} }
J.M. Lord. A projective limit characterization of GIF semigroups with an N-congruence.. Semigroup forum, Tome 19 (1980), pp. 267-282. http://geodesic.mathdoc.fr/item/SF_1980__19_134388/