A counterexample in the cohomology of monoids.
Nico, W.R.
Semigroup forum, Tome 4 (1972), p. 93-94 / Harvested from Göttinger Digitalisierungszentrum
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Publié le : 1972-01-01
EUDML-ID : urn:eudml:doc:133883 
@article{GDZPPN001248189,
     title = {A counterexample in the cohomology of monoids.},
     journal = {Semigroup forum},
     volume = {4},
     year = {1972},
     pages = {93-94},
     zbl = {0254.18011},
     url = {http://dml.mathdoc.fr/item/GDZPPN001248189}
}

Nico, W.R. A counterexample in the cohomology of monoids.. Semigroup forum, Tome 4 (1972) pp. 93-94. http://gdmltest.u-ga.fr/item/GDZPPN001248189/