Bygum, Anette, et al. “Phylloid Hypermelanosis in a Child With Psychomotor Delay, Cicatricial Alopecia, Hearing Loss and Polythelia”. Acta Dermato-Venereologica, vol. 92, no. 2, Jan. 2012, pp. 191-2, doi:10.2340/00015555-1259.