O. Thummapol, P. Sanitnarathorn, S. Thongma, W. Srithumsuk, and D. Tunthanongsakkul, “What Influences Thai Community-Dwelling Older Adults to Undertake Health Protective Behaviors in the Time of COVID-19 Pandemic? A Structural Equation Modeling Analysis”, Asian Health Sci.Tech.Rep., vol. 30, no. 2, pp. 87–98, Aug. 2021.