Sharma, O.P., and I.C. Papanikolaou. “Lupus Pernio: A Tale of Four Characters in Search of a Malady”. Sarcoidosis, Vasculitis and Diffuse Lung Diseases, vol. 26, no. 2, Dec. 2009, pp. 167-71, https://mattioli1885journals.com/index.php/sarcoidosis/article/view/2604.