Lakmini, Herath; Marasingha, M. A. J. C.; Meedeniya, Dulani; Weerasinghe, Vajira(Department of Industrial Management, Faculty of Science, University of Kelaniya Sri Lanka, 2021)
Wasana, K. G. P.; Attanayake, A. P.; Jayasinghe, J. M. S.; Weeraratna, T. P.; Jayatilaka, K. A. P. W.(Faculty of Science, University of Kelaniya, Sri Lanka, 2021)