@article{10_1007_s10587_012_0046_1,
     author = {Maney, Jack and Ponomarenko, Vadim},
     title = {Diversity in monoids},
     journal = {Czechoslovak Mathematical Journal},
     pages = {795--809},
     publisher = {mathdoc},
     volume = {62},
     number = {3},
     year = {2012},
     doi = {10.1007/s10587-012-0046-1},
     mrnumber = {2984635},
     zbl = {1265.20060},
     language = {en},
     url = {https://geodesic-test.mathdoc.fr/articles/10.1007/s10587-012-0046-1/}
}