@article {MR4065098,
	title = {Varieties of regular semigroups with uniquely defined inversion},
	journal = {Port. Math.},
	volume = {76},
	number = {2},
	year = {2019},
	note = {n/a},
	pages = {205{\textendash}228},
	abstract = {n/a},
	issn = {0032-5155},
	doi = {10.4171/pm/2033},
	url = {https://doi.org/10.4171/pm/2033},
	author = {Ara{\'u}jo, Jo{\~a}o and Kinyon, Michael and Robert, Yves}
}
