Fernando, P. A.; Nanayakkara, L. D. J. F.; Tharaka, V. K.; Niwunhella, D. H. H.(4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)
Warnakulasuriya, M. M.; Vidanagamachchi, K.; Niwunhella, D. H. H.; Nanayakkara, L. D. J. F.(4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)
Niwunhella, D. H. H.; Rupasinghe, T. D.(International Research Symposium on Pure and Applied Sciences, 2017 Faculty of Science, University of Kelaniya, Sri Lanka., 2017)
Weerakkody, H. D. W.; Niwunhella, D. H. H.; Wijayanayake, A. N.(Department of Industrial Management, Faculty of Science, University of Kelaniya Sri Lanka, 2021)
Prabodhika, A. P. K. J.; Niwunhella, D. H. H.; Wijayanayake, A. N.(Department of Industrial Management, Faculty of Science, University of Kelaniya Sri Lanka, 2021)
Thalagahage, N. T. H.; Wijayanayake, A. N.; Niwunhella, D. H. H.(Department of Industrial Management, Faculty of Science, University of Kelaniya Sri Lanka, 2021)
Ranathunga, M. I. D.; Wijayanayake, A. N.; Niwunhella, D. H. H.(Department of Industrial Management, Faculty of Science, University of Kelaniya Sri Lanka, 2021)
Ranathunga, M. I. D.; Wijayanayake, A. N.; Niwunhella, D. H. H.(Department of Industrial Management, Faculty of Science, University of Kelaniya Sri Lanka, 2022)
Prasadika, A. P. K. J.; Wijayanayake, A. N.; Niwunhella, D. H. H.(Department of Industrial Management, Faculty of Science, University of Kelaniya Sri Lanka, 2022)
Kumari, A.G.K.C.; Wijayanayake, A. N.; Niwunhella, D. H. H.(Department of Industrial Management, Faculty of Science, University of Kelaniya Sri Lanka, 2022)