@article{GDZPPN001258362,
title = {Infinite products in monoids.},
journal = {Semigroup forum},
volume = {33},
year = {1986},
pages = {21-68},
zbl = {0601.20061},
url = {http://dml.mathdoc.fr/item/GDZPPN001258362}
}
Dehornoy, P. Infinite products in monoids.. Semigroup forum, Tome 33 (1986) pp. 21-68. http://gdmltest.u-ga.fr/item/GDZPPN001258362/