GUL, Samreen; RIAZ, Mehreen; WAHAB, Muhammad; HUSSAIN, Ahad. A cross-sectional study of the COVID-19 prevalence in Dir Lower, Pakistan. Natural and Applied Sciences International Journal (NASIJ), Peshawar, Pakistan, v. 3, n. 1, p. 61–70, 2022. DOI: 10.47264/idea.nasij/3.1.5. Disponível em: https://ideapublishers.org/index.php/nasij/article/view/809. Acesso em: 4 oct. 2025.