Tariyo, P. “The situation of detecting COVID-19 virus variants and clinical symptoms of infected patients at Nakornping Hospital, Chiang Mai during 2021–2023”. Journal of Nakornping Hospital, vol. 16, no. 1, Mar. 2025, pp. 79-92, https://he01.tci-thaijo.org/index.php/jnkp/article/view/271818.