SANTOS-BOCANEGRA, E.; OSPINA-OSORIO, X.; OVIEDO-RONDON, E.O. Evaluation of Xanthophylls Extracted from Tagetes erectus (Marigold Flower) and Capsicum Sp. (Red Pepper Paprika) as a Pigment for Egg-yolks Compare with Synthetic Pigments. International Journal of Poultry Science, Pakistan, v. 3, n. 11, p. 685–689, 2004. DOI: 10.3923/ijps.2004.685.689. Disponível em: https://ijpsjournal.org/index.php/ijps/article/view/258. Acesso em: 22 sep. 2025.