Celeste Jr, J., J. E. Sevilleja, V. P. Bongolan, R. L. Rivera, S. E. Caoili, and R. de Castro. “COVID-19 Mortality in the Philippines: Province-Level Ecological Analysis, 2020–2023”. Western Pacific Surveillance and Response, vol. 17, no. 1, Mar. 2026, doi:10.5365/wpsar.2026.17.1.1128.