@article{GDZPPN001262718,
title = {Positivity and cohomology for involutive semigroups.},
journal = {Semigroup forum},
volume = {46},
year = {1993},
pages = {60-80},
zbl = {0818.46067},
url = {http://dml.mathdoc.fr/item/GDZPPN001262718}
}
Jorgensen, P.E.T.; Quan, X.C. Positivity and cohomology for involutive semigroups.. Semigroup forum, Tome 46 (1993) pp. 60-80. http://gdmltest.u-ga.fr/item/GDZPPN001262718/