Largest 2-generated subsemigroups of the symmetric inverse semigroup." *Proc. Edinb. Math. Soc. (2)*. 50 (2007): 551-561.Website

"Automorphisms of partial endomorphism semigroups." *Publicationes Mathematicae Debrecen*. 79.1-2 (2011): 23-39.

"On generators and relations for unions of semigroups." *Semigroup Forum*. 63 (2001): 49-62.

"Ranks and presentations of some normally ordered inverse semigroups." *Periodica Mathematica Hungarica (DOI 10.1007/s10998-022-00448-8)*. 85 (2022): 435-447. AbstractWebsite

"Partial transformation monoids preserving a uniform partition." *Semigroup Forum (DOI 10.1007/s00233-014-9629-5)*. 90.2 (2015): 532-544. AbstractWebsite

"Relative abelian kernels of some classes of transformation monoids." *Bull. Austral. Math. Soc.*. 73 (2006): 375-404.Website

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

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

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

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

" "

On monoids of endomorphisms of a cycle graph." (Submitted). Abstract

"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)* (In Press). Abstract

"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.

"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

"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

"Partial Automorphisms and Injective Partial Endomorphisms of a Finite Undirected Path." *Semigroup Forum*. 103 (2021): 87-105. 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 the rank of semigroups of transformations on a finite set with restricted range." *Algebra Colloquium*. 21.3 (2014): 497-510.authorsfinalversion.pdfWebsite

"On the monoids of transformations that preserve the order and a uniform partition." *Communications in Algebra*. 39.8 (2011): 2798-2815.

"Endomorphisms of semigroups of order-preserving partial transformations." *Semigroup Forum (10.1007/s00233-018-9948-z)*. 99 (2019): 333-344. AbstractWebsite

"Presentations for some monoids of partial transformations on a finite chain." *Comm. Algebra*. 33 (2005): 587-604.Website

"Semigroups of order preserving mappings on a finite chain: a new class of divisors." *Semigroup Forum*. 54 (1997): 230-236.Website

"A note on bilateral semidirect product decompositions of some monoids of order-preserving partial permutations." *Bull. Korean Math. Soc.*. 53.2 (2016): 495-506. AbstractWebsite

"