Marcoval, Joaquim, and Juan Mañá. “Papular Sarcoidosis of the Knees. A Frequent Form of Presentation of Systemic Sarcoidosis”. Sarcoidosis, Vasculitis and Diffuse Lung Diseases 33, no. 1 (March 29, 2016): 59–65. Accessed July 30, 2025. https://mattioli1885journals.com/index.php/sarcoidosis/article/view/4256.