The infinite minimal rich monoid
Acta Universitatis Carolinae. Mathematica et Physica, Tome 18 (1977) no. 2, pp. 23-34.
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@article{AUCMP_1977__18_2_a3, author = {Gregor, R.}, title = {The infinite minimal rich monoid}, journal = {Acta Universitatis Carolinae. Mathematica et Physica}, pages = {23--34}, publisher = {mathdoc}, volume = {18}, number = {2}, year = {1977}, mrnumber = {0498789}, zbl = {0416.18003}, language = {en}, url = {https://geodesic-test.mathdoc.fr/item/AUCMP_1977__18_2_a3/} }
Gregor, R. The infinite minimal rich monoid. Acta Universitatis Carolinae. Mathematica et Physica, Tome 18 (1977) no. 2, pp. 23-34. https://geodesic-test.mathdoc.fr/item/AUCMP_1977__18_2_a3/