@article{GDZPPN001253972,
title = {Varietes de languages et monoide des parties.},
journal = {Semigroup forum},
volume = {20},
year = {1980},
pages = {11-48},
zbl = {0451.20061},
url = {http://dml.mathdoc.fr/item/GDZPPN001253972}
}
Pin, J.E. Varietes de languages et monoide des parties.. Semigroup forum, Tome 20 (1980) pp. 11-48. http://gdmltest.u-ga.fr/item/GDZPPN001253972/