Algermissen, Bernd, Francoise Toppe, Beate M. Henz, Hans-Peter Berlien, and Norbert Haas. “Hypertrichotic Plaque-Type Blue Naevus--a Novel Type of Dermal Melanocytosis: Report of an Unusual Case”. Acta Dermato-Venereologica 82, no. 1 (May 16, 2002): 61–62. Accessed July 1, 2026. https://medicaljournalssweden.se/actadv/article/view/13671.