Haltas, H., E. Turkmen, and M. Naci Edali. “Hyperkeratosis Follicularis Et Parafollicularis in Cutem Penetrans (Kyrle’s Disease): Case Report”. Annals of Medical Research, vol. 11, no. 1, May 2021, pp. 0041-3, http://annalsmedres.org/index.php/aomr/article/view/3024.