Al-Qarqaz, F., K. Bodoor, A. Baba, A. Al-Yousef, J. Muhaidat, and D. Alshiyab. “Post-Acne Hyperpigmentation: Evaluation of Risk Factors and the Use of Artificial Neural Network As a Predictive Classifier”. Dermatology Reports, vol. 13, no. 3, Oct. 2021, doi:10.4081/dr.2021.8223.