Concept of Akhlat-E-Arba and its Importance. International Journal of Environmental Sciences, [S. l.], p. 2206–2209, 2025. DOI: 10.64252/c3x2fv31. Disponível em: https://theaspd.com/index.php/ijes/article/view/7212.. Acesso em: 6 aug. 2026.