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

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

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

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

"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

"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

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

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

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

"The ranks of ideals in various transformation monoids." *Communications in Algebra (DOI:10.1080/00927872.2013.847946) *. 43.2 (2015): 674-692. 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 the rank of semigroups of transformations on a finite set with restricted range." *Algebra Colloquium*. 21.3 (2014): 497-510.

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

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

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

"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.

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

"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

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

"Bilateral semidirect product decompositions of transformation monoids." *Semigroup Forum*. 82 (2011): 271-287. Abstract

"Endomorphisms of the semigroup of order-preserving mappings." *Semigroup Forum*. 81 (2010): 277-285.Website

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

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