Perera, R. N. N.; Magamage, M. P. S.; Siriwardhana, C.(4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)
Dissanayake, C. T. M.; Weerasinghe, V. P. A.(4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)
Gunawardane, N.D.P.; De Croos, M. D. S. T.; Amarasinghe, U.S.(4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)
Fernando, N. F. B. T.; Madhusankha, W.A.I.; Samarasekara, E.A.S.I.(International Conference on Applied Social Statistics (ICASS) - 2019, Department of Social Statistics, Faculty of Social Sciences, University of Kelaniya, Sri Lanka, 2019)
Jayakody, J. A. M. B.(5th National Conference on Applied Social Statistics (NRCASS) - 2019, Department of Social Statistics, Faculty of Social Sciences, University of Kelaniya, Sri Lanka, 2019)
Ramanayake, S.S.(International Journal of Academic Staff (IJAS – 2019), Volume 01, Issue 01. Department of Social Statistics, Faculty of Social Sciences, University of Kelaniya, Sri Lanka, 2019)