Sami Metin, M., O. Kizilyel, O. Faruk Elmas, and A. Aktas. “Twenty Nail Dystrophy Associated With Alopecia Areata”. Annals of Medical Research, vol. 21, no. 2, May 2021, pp. 0160-1, http://www.annalsmedres.org/index.php/aomr/article/view/1976.