On divisors of pseudovarieties generated by some classes of full transformation semigroups." *Algebra Colloq.*. 15 (2008): 581-588.

"On divisors of semigroups of order-preserving mappings of a finite chain." *Semigroup Forum*. 81 (2010): 551-554.Website

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

" "

On orientation-preserving transformations of a chain." *Communications in Algebra (DOI 10.1080/00927872.2020.1870996)*. 49.6 (2021): 2300-2325. AbstractWebsite

" "

On semigroups of endomorphisms of a chain with restricted range." *Semigroup Forum (DOI: 10.1007/s00233-013-9548-x)*. 89.1 (2014): 77-104. AbstractWebsite

" "

On semigroups of orientation-preserving transformations with restricted range." *Communications in Algebra (DOI:10.1080/00927872.2014.975345)*. 44.1 (2016): 253-264. Abstractauthorsfinalversion.pdfWebsite

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

"On the cyclic inverse monoid on a finite set." *Asian-European Journal of Mathematics (10.1142/S1793557124500177)* (In Press). AbstractWebsite

"On the monoid of partial isometries of a cycle graph." *Turkish Journal of Mathematics (DOI 10.55730/1300-0098.3460)*. 47 (2023): 1746-1760. AbstractWebsite

"On the monoid of partial isometries of a finite star graph." *Communications in Algebra (DOI 10.1080/00927872.2022.2121404; Online 14 Sep 2022)*. 51.3 (2023): 1028-1048. AbstractWebsite

"On the monoid of partial isometries of a wheel graph." *Asian-European Journal of Mathematics (DOI 10.1142/S1793557123502388; Online 16 Dec 2023)*. 17.1 (2024): 2350238 (18 pages). AbstractWebsite

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

"On the Rank of Monoids of Endomorphisms of a Finite Directed Path." *Asian-European Journal of Mathematics (DOI 10.1142/S1793557123500699; Online 28 Oct 2022)*. 16.04 (2023): 2350069 (13 pages). 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 ranks of certain monoids of transformations that preserve a uniform partition." *Communications in Algebra*. 42.2 (2014): 615-636.

"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

"Oriented transformations on a finite chain: another description." *Commun. Korean Math. Soc. (DOI 10.4134/CKMS.c220272; Online 12 July 2023)*. 38.3 (2023): 725-731. AbstractWebsite

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