@article{Straubing_1982,
    doi = {10.1007/bf02572753},
    url = {https://doi.org/10.1007%2Fbf02572753},
    year = {1982},
    month = {dec},
    publisher = {Springer Science and Business Media {LLC}},
    volume = {24},
    number = {1},
    pages = {25--38},
    author = {Howard Straubing},
    title = {The variety generated by finite nilpotent monoids},
    journal = {Semigroup Forum}
}

@article{Straubing_1982, doi = {10.1007/bf02572753}, url = {https://doi.org/10.1007%2Fbf02572753}, year = {1982}, month = {dec}, publisher = {Springer Science and Business Media {LLC}}, volume = {24}, number = {1}, pages = {25--38}, author = {Howard Straubing}, title = {The variety generated by finite nilpotent monoids}, journal = {Semigroup Forum} }