Westermark, P, E Ridderström, and A. Vahlquist. 1996. “Macular Posterior Pigmentary Incontinence: Its Relation to Macular Amyloidosis and Notalgia Paresthetica”. Acta Dermato-Venereologica 76 (4):302-4. https://doi.org/10.2340/0001555576302304.