Effect of two surfactants on in vitro permeation of butorphanol through horse nasal mucosa. Uniciencia, [S. l.], v. 35, n. 2, p. 1–9, 2021. DOI: 10.15359/ru.35-2.1. Disponível em: https://www.revistas.una.ac.cr/index.php/uniciencia/article/view/14784.. Acesso em: 4 may. 2024.