Mathew Varkey T.K.,Susan Ray Joseph; On T.D.Parsons conjecture for Hamiltonian cycle in every Cayleygraph; Bulletin of Kerala Mathematical Associations;Vol.15;June 2018, pp. 69-74.

Susan Ray Joseph, Mathew Varkey T.K.;Some results on products of disemigraphs; Topology and Fractals;ISBN-978-93-88761-01-7;pp127-146.June 2018

Mathew Varkey T.K.,Susan Ray Joseph; On Product of Disemigraphs; Global Journal of Pure and Applied Mathematics;ISSN 0973-1768 Volume 13, Number 9 (2017), pp. 4505-4514. 

Susan Ray Joseph, Mathew Varkey T.K.; On The Quotient Graph in The Cayley Graphs of Solvable Groups; Aryabhatta Journal of Mathematics and Informatics, Vol . 09; issue 102; July- December 2017, pp. 162-166. 

Mathew Varkey T.K.,Susan Ray Joseph; On Partially Ordered Disemigraphs; International Journal of Computational and Applied Mathematics;ISSN 1819-4966 Volume 12, Number 2 (2017), pp. 503- 509. 

Mathew Varkey T.K.,Susan Ray Joseph; A Study on the Normed Graphs and Disemigraphs; Annals of Pure and Applied Mathematics; Vol. 11, No. 2, 2016, 233-238; ISSN: 2279-087X (P), 2279-0888(online); 18 December 2016.