VAHLQUIST , Anders; STENSTRÖM , Eva; TÖRMÄ , Hans. Vitamin A and β-Carotene Concentrations at Different Depths of the Epidermis: A Preliminary Study in the Cow Snout. Upsala Journal of Medical Sciences, [S. l.], v. 92, n. 3, p. 253–257, 1987. DOI: 10.3109/03009738709178695. Disponível em: https://ujms.net/index.php/ujms/article/view/6875. Acesso em: 14 nov. 2026.