@article{GDZPPN002031892, title = {Green's L-relation for semigroups and compactifications.}, journal = {Aequationes mathematicae}, volume = {19}, year = {1979}, pages = {123-133}, zbl = {0442.20051}, url = {http://dml.mathdoc.fr/item/GDZPPN002031892} }
Magill, Kenneth D. Jr. Green's L-relation for semigroups and compactifications.. Aequationes mathematicae, Tome 19 (1979) pp. 123-133. http://gdmltest.u-ga.fr/item/GDZPPN002031892/