K. Aroni, K. Anagnostopoulou, E. Tsagroni, and E. Ioannidis, “Skin Hyperpigmentation and Increased Angiogenesis Secondary to Vitamin B12 Deficiency in a Young Vegetarian Woman”, Acta Derm Venereol, vol. 88, no. 2, pp. 191–192, Jan. 2008.