Abdullah, L., H. Garg, N. A. Awang, H. Mohd Pauzi, and H. Hashim. “Non-Pharmaceutical Intervention Strategies to Respond to the COVID-19 Pandemic: Preference Ranking Method”. Operational Research in Engineering Sciences: Theory and Applications, Vol. 5, no. 3, Oct. 2022, pp. 108-30, doi:10.31181/oresta051022076a.