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@article{AM2_1979__19_136819, author = {Kenneth D. Jr. Magill}, title = {Green's {L-relation} for semigroups and compactifications.}, journal = {Aequationes mathematicae}, pages = {123--133}, publisher = {mathdoc}, volume = {19}, year = {1979}, zbl = {0442.20051}, url = {http://geodesic.mathdoc.fr/item/AM2_1979__19_136819/} }
Kenneth D. Jr. Magill. Green's L-relation for semigroups and compactifications.. Aequationes mathematicae, Tome 19 (1979), pp. 123-133. http://geodesic.mathdoc.fr/item/AM2_1979__19_136819/