 P.A.S.D. Perera, G.S. Wijesiri, Encryption and Decryption Algorithms in Symmetric Key Cryptography Using Graph Theory, Psychology and Education Journal, Vol. 58 No 1(2021), 34203427.
 W.W.P.M.T.M. Karunasena, G.S. Wijesiri, Application of Graph Theory in DNA similarity analysis of Evolutionary Closed Species, Psychology and Education Journal, Vol. 58 No 1(2021), 34283434.
 P.A.S.D. Perera, G.S. Wijesiri, Encryption Algorithms using Graph Theory in Symmetric Cryptography for providing better Data Security, Postgraduate Institute of Science Research Congress, University of Peradeniya, 2020, Page no.107
 W.W.P.M.T.M. Karunasena, G.S. Wijesiri, A Study of DNA Similarity Analysis in Evolutionary relationship using Graph Theory, Postgraduate Institute of Science Research Congress, University of Peradeniya, 2020, Page no 108

Kavirathne S.D., Wijesiri G.S., Optimal Performable Green Light Assignment of a Traffic Intersection using Maximal Independent Independent Vector Set of a Graph, Proceedings of the 12th International Research Conference of Kothalawala Defence University, Sri Lanka, 2019.

Kavirathne S.D., Wijesiri G.S., Optimal Feasible Green Light Assignment to a Traffic Intersection using Graph theory, Asia International Conference on Multidisciplinary Research, 2019.
 Nisansala A., Wijesiri G.S., Scalar and MultiScalar Addition chain in Elliptic curve cryptography, ICACT 2019, Faculty of Computing & Technology, University of Kelaniya, Sri Lanka.
 Sandamali N.P.A.A., Wijesiri G.S., Scalar and multiscalar multiplication in Elliptic Curve Cryptography using Fibonacci numbers, International Research Symposium on Pure and Applied Sciences, 2018, Faculty of Science, University of Kelaniya, Kelaniya, Sri Lanka, 2018.

 Karunathilaka N.G.A., Panda S., Mallawaarachchi D.K., Wijesiri, G.S., Hansameenu W.T.P., Modeling NonIsothermal wirecoating from a bath using Giesekus fluid, International Research Symposium on Pure and Applied Sciences, 2017, Faculty of Science, University of Kelaniya, Kelaniya, Sri Lanka, 2017.

 Kolombage K.A.D.D.B.V, Wijesiri G.S., An investigation of properties of prime graph of noncommutative rings, Annual Session of SLAAS 2017.

 Kolombage K.A.D.D.B.V, Wijesiri G.S., The chromatic number of prime graph of a noncommutative ring M_{n×n} (Ζ_{2}), International Research Symposium on Pure and Applied Sciences, 2016, Faculty of Science, University of Kelaniya, Kelaniya, Sri Lanka, 2016.

 Perera P.S.L., Wijesiri G.S., A masking method for resisting key attacks on AES, International Research Symposium on Pure and Applied Sciences, 2016, Faculty of Science, University of Kelaniya, Kelaniya, Sri Lanka, 2016.

 G. Wijesiri, Thetanulls of cyclic curves of genus 4, Annual research symposium, FGS, University of Kelaniya, Kelaniya,2013

 T. Shaska, C. Shor, G. S. Wijesiri, Codes over rings of size p^{2} and lattices over imaginary quadratic fields, Finite Fields Appl. 16 (2010) no. 2, 7587.

 E. Previato, T. Shaska, G. wijesiri, Theta nulls of cyclic curves with automorphisms, Algebraic aspects of digital communications, NATO Sci. Peace Secur. Ser. D. Inf. Commun. Secur., 24, IOS, Amsterdam, 2009, 193237

 T. Shaska, G. S. Wijesiri, S. Wolf, L. Woodland, Degree 4 coverings of elliptic curves by genus 2, Albanian J. Math. Vol.2, (2008), No. 4, 307318.

 T. Shaska, G. Wijesiri, Codes over rings of size four, Hermitian lattices and corresponding theta functions, Proc. Amer.Mathe. Soc., 136 (2008), no.3, 849857.

 E. Previato, T. Shaska, G. s. Wijesiri, Theta nulls of cyclic curves of small genus, Albanian J. Math. Vol. 1, No. 4, 2007, 253270.
