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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 partial endomorphisms of a star graph." *Quaestiones Mathematicae (DOI 10.2989/16073606.2024.2374796; Online 31 July 2024)* (2024). AbstractWebsite

"On three submonoids of the dihedral inverse monoid on a finite set." *Bulletin of the Malaysian Mathematical Sciences Society (DOI 10.1007/s40840-023-01620-0; Online 11 Dec 2023)*. 47 (2024): 27. 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.

"Presentations for three remarkable submonoids of the dihedral inverse monoid on a finite set." *Semigroup Forum (DOI 10.1007/s00233-023-10396-5; Online 31 Oct 2023)*. 107 (2023): 315-338. AbstractWebsite

"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

"On monoids of endomorphisms of a cycle graph." *Mathematica Slovaca (DOI 10.1515/ms-2024-0078; Online 15 October 2024)*. 74.5 (2024): 1071-1088. AbstractWebsite

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

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