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Abelian kernels of monoids of order-preserving maps and of some of its extensions." *Semigroup Forum*. 68 (2004): 335-356.Website

"Rees quotients of numerical semigroups." *Portugaliae Mathematica*. 70.2 (2013): 93-112. AbstractWebsite

"Abelian kernels of some monoids of injective partial transformations and an application." *Semigroup Forum*. 61 (2000): 435-452.Website

"Abelian kernels, solvable monoids and the abelian kernel length of a finite monoid." *Semigroups and languages*. World Sci. Publ., River Edge, NJ, 2004. 68-85.

"On semigroups whose idempotent-generated subsemigroup is aperiodic." *Internat. J. Algebra Comput.*. 14 (2004): 655-665.Website

"Ranks of monoids of endomorphisms of a finite undirected path (DOI: 10.1007/s40840-019-00762-4)." *Bulletin of the Malaysian Mathematical Sciences Society*. 43 (2020): 1623-1645. AbstractWebsite

"Partial Automorphisms and Injective Partial Endomorphisms of a Finite Undirected Path." *Semigroup Forum*. 103 (2021): 87-105. AbstractWebsite

"A note on generators of the endomorphism semigroup of an infinite countable chain." *Journal of Algebra and its Applications (DOI: 10.1142/S0219498817500311)*. 16 (2017): 1750031 (9 pages). AbstractWebsite

"The maximal subsemigroups of semigroups of transformations preserving or reversing the orientation on a finite chain." *Publicationes Mathematicae Debrecen*. 81.1-2 (2012): 11-29.

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