MUHAMMAD ISLAM; MUHAMMAD UMAR ASLAM; TRAN THI HONG NGỌC; PHAN TRUONG KHANH. A Categorization Based Comparative Study of Food Security and Population in the World’s Five Most Populous Countries. Proceedings of the Pakistan Academy of Sciences: B. Life and Environmental Sciences, [S. l.], v. 63, n. 1, p. 21–31, 2026. DOI: 10.53560/PPASB(63-1)1124. Disponível em: https://ppaspk.org/index.php/PPAS-B/article/view/1621. Acesso em: 26 jul. 2026.