PAVEL, S.; ELZINGA, H.; MUSKIET, FA.; WOLTHERS, BG. Identification of 5,6-dimethoxyindolyl-2-carboxylic acid in melanotic urine. Acta Dermato-Venereologica, [S. l.], v. 63, n. 4, p. 340–343, 1983. DOI: 10.2340/0001555563340343. Disponível em: https://medicaljournalssweden.se/actadv/article/view/7899. Acesso em: 25 may. 2026.