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@article{SF_1979__17_134329, author = {T. Head}, title = {Quotient monoids and greatest commutative monoid images of several types.}, journal = {Semigroup forum}, pages = {351--364}, publisher = {mathdoc}, volume = {17}, year = {1979}, zbl = {0427.20052}, url = {http://geodesic.mathdoc.fr/item/SF_1979__17_134329/} }
T. Head. Quotient monoids and greatest commutative monoid images of several types.. Semigroup forum, Tome 17 (1979), pp. 351-364. http://geodesic.mathdoc.fr/item/SF_1979__17_134329/