Pyne, John, Devendra Sapkota, and Jian Cheng Wong. “Cutaneous Horns: Clues to Invasive Squamous Cell Carcinoma Being Present in the Horn Base”. Dermatology Practical & Conceptual (April 30, 2013): 3–7. Accessed April 25, 2026. https://www.dpcj.org/index.php/dpc/article/view/dermatol-pract-concept-articleid-dp0302a02.