A division theorem for the pseudovariety generated by semigroups of orientation preserving transformations on a finite chain." *Comm. Algebra*. 29 (2001): 451-456.Website

"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 injective partial transformations on a finite chain." *Southeast Asian Bull. Math.*. 28 (2004): 903-918.

"Presentations for monoids of finite partial isometries." *Semigroup Forum (DOI: 10.1007/s00233-015-9759-4)*. 93.1 (2016): 97-110. AbstractWebsite

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On the ranks of certain monoids of transformations that preserve a uniform partition." *Communications in Algebra*. 42.2 (2014): 615-636.

"Congruences on monoids of transformations preserving the orientation of a finite chain." *J. Algebra*. 321 (2009): 743-757.Website

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

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

"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

"The monoid of all injective order preserving partial transformations on a finite chain." *Semigroup Forum*. 62 (2001): 178-204.

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

"Presentations for some monoids of partial transformations on a finite chain: a survey." *Semigroups, algorithms, automata and languages (Coimbra, 2001)*. World Sci. Publ., River Edge, NJ, 2002. 363-378.

"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

"Congruences on monoids of order-preserving or order-reversing transformations on a finite chain." *Glasg. Math. J.*. 47 (2005): 413-424.Website

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

"The cardinal of various monoids of transformations that preserve a uniform partition." *Bulletin of the Malaysian Mathematical Sciences Society*. 35.4 (2012): 885-896.

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

"The cardinal and the idempotent number of various monoids of transformations on a finite chain." *Bulletin of the Malaysian Mathematical Sciences Society*. 34.2 (2011): 79-85. Abstract

"Oriented transformations on a finite chain: another description." *Commun. Korean Math. Soc.* (In Press). Abstract

"The monoid of all injective orientation preserving partial transformations on a finite chain." *Comm. Algebra*. 28 (2000): 3401-3426.Website

"The Vagner-Preston representation of a block-group." *Southeast Asian Bull. Math.*. 45.6 (2021): 805-812. AbstractWebsite

"The rank of the semigroup of all order-preserving transformations on a finite fence." *Bulletin of the Malaysian Mathematical Sciences Society (DOI: 10.1007/s40840-017-0598-1)*. 42.5 (2019): 2191-2211. AbstractWebsite

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

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