@article{GDZPPN001253093, title = {Algebraic dimension of semigroups with application to invariant measures.}, journal = {Semigroup forum}, volume = {18}, year = {1979}, pages = {185-187}, zbl = {0407.22001}, url = {http://dml.mathdoc.fr/item/GDZPPN001253093} }
Székely, G.J. Algebraic dimension of semigroups with application to invariant measures.. Semigroup forum, Tome 18 (1979) pp. 185-187. http://gdmltest.u-ga.fr/item/GDZPPN001253093/