@article{GDZPPN001256149,
title = {Left thickness, left amenability and extreme left amenability.},
journal = {Semigroup forum},
volume = {26},
year = {1983},
pages = {307-316},
zbl = {0509.22001},
url = {http://dml.mathdoc.fr/item/GDZPPN001256149}
}
Wong, J.C.S. Left thickness, left amenability and extreme left amenability.. Semigroup forum, Tome 26 (1983) pp. 307-316. http://gdmltest.u-ga.fr/item/GDZPPN001256149/