Wittbjer, A, G Odh, E Rosengren, and H Rorsman. “A Sensitive Tyrosinase Method for Human Skin”. Acta Dermato-Venereologica 71, no. 5 (January 1, 1991): 399–402. Accessed February 25, 2025. https://medicaljournalssweden.se/actadv/article/view/16831.