Sahu, R. R., T. Sahu, Y. Verma, and D. Kumar. “A Systemic Review on Acne and Post Acne Hyperpigmentation”. International Journal of Progressive Research in Science and Engineering, vol. 5, no. 03, Apr. 2024, pp. 26-32, https://journal.ijprse.com/index.php/ijprse/article/view/1022.