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@article{SF_1983__26_134612, author = {J.C.S. Wong}, title = {Left thickness, left amenability and extreme left amenability.}, journal = {Semigroup forum}, pages = {307--316}, publisher = {mathdoc}, volume = {26}, year = {1983}, zbl = {0509.22001}, url = {http://geodesic.mathdoc.fr/item/SF_1983__26_134612/} }
J.C.S. Wong. Left thickness, left amenability and extreme left amenability.. Semigroup forum, Tome 26 (1983), pp. 307-316. http://geodesic.mathdoc.fr/item/SF_1983__26_134612/