K, V. K. Biological barriers and their impact on pharmaceutical drug delivery systems: an integrative review. Zoology, Ecology and Pharma Advances, [S. l.], v. 1, n. 1, p. 10–11, 2025. Disponível em: https://uniquepubinternational.com/journals/index.php/zepa/article/view/171. Acesso em: 25 may. 2026.