9.) Panma S., Meksawang J., Isomorphism Conditions for Cayley Graphs of Rectangular Groups, Bulletin of the Malaysian Mathematical Sciences Society, 39, (2016),29-41.
10.) Pipattanajinda N., Knauer U., Gyurov B., Panma S., Mazorchuk V., The endomorphism monoids of (n − 3)-regular graphs of order n, Algebra and Discrete Mathematics, 22, (2016),284-300.
11.) Suksumran T., Panma S., On connected cayley graphs of semigroups, Thai Journal of Mathematics, 13, (2015),641-652.
12.) Ruangnai M., Panma S., Arworn S., On Cayley isomorphisms of left and right groups, International Journal of Pure and Applied Mathematics, 80, (2012),561-571.
13.) Panma S., Arworn S., Phongchan S., On cayley isomorphisms of clifford semigroups, International Journal of Pure and Applied Mathematics, 79, (2012),667-682.
14.) Promsakon C., Panma S., Connectedness of endo-cayley digraphs of right(left) zero union of semigroups, International Journal of Pure and Applied Mathematics, 77, (2012),51-61.
15.) Promsakon C., Panma S., Functorial properties of endo-Cayley constructions, Far East Journal of Mathematical Sciences, 51, (2011),1-15.
16.) Panma S., Knauer U., Arworn S., On transitive Cayley graphs of strong semilattices of right (left) groups, Discrete Mathematics, 309, (2009),5393-5403.
17.) Panma S., Na Chiangmai N., Knauer U., Arworn S., Characterizations of Clifford semigroup digraphs, Discrete Mathematics, 306, (2006),1247-1252.