Wihastyoko, H. Y. L., D. S. Perdanakusuma, S. Soeharto, E. Widjajanto, K. Handono, and B. Pardjianto. “Correlation of Melanin Content With Collagen Density in Keloid Patients”. Open Access Macedonian Journal of Medical Sciences, vol. 9, no. B, Apr. 2021, pp. 265-71, doi:10.3889/oamjms.2021.6002.