UCHEGBU, Nneka; NNAMOCHA, Theresa; ISHIWU, Charles. Natural Food Colourants Juxtaposed with Synthetic Food Colourant: A Review. Pakistan Journal of Nutrition, Pakistan, v. 19, n. 8, p. 404–419, 2020. DOI: 10.3923/pjn.2020.404.419. Disponível em: https://pjnonline.org/pjn/article/view/2876. Acesso em: 10 sep. 2025.