Akaberi, A. A., P. Kafaie, M. T. Noorbala, F. Binesh, and H. Hajihossieni. “Acne Keloidalis Nuchae in a Caucasian Woman”. Journal of Pakistan Association of Dermatologists, vol. 21, no. 1, Dec. 2016, pp. 66-68, https://www.jpad.com.pk/index.php/jpad/article/view/441.