Peters, Timothy J.; Wilkinson, D. (2010). "King George III and Porphyria: A Clinical Re-Examination of the Historical Evidence". History of Psychiatry. Vol. 21, no. 1. pp. 3–19. doi:10.1177/0957154X09102616. PMID21877427.
Peters, Timothy J.; Wilkinson, D. (2010). "King George III and Porphyria: A Clinical Re-Examination of the Historical Evidence". History of Psychiatry. Vol. 21, no. 1. pp. 3–19. doi:10.1177/0957154X09102616. PMID21877427.