Quasi-idempotents in finite semigroup of full order-preserving transformations von Imam, A. T., Ibrahim, S., Garba, G. U., Usman, L., Idris, A.

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Generators and relations for the semigroups of increasing functions on \(\mathbb{N}\) and \(\mathbb{Z}\) von Doroshenko, Vadym

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On inverse subsemigroups of the semigroup of orientation-preserving or orientation-reversing transformations von Catarino, Paula, Higgins, Peter M., Levi, Inessa

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