KAWKITINARONG, K. .; ANANPIPATKUL, A. .; SAE-EAO, N. .; ASAWAWICHIENCHINDA, T. .; SIRICHANA, W. . Effects of fenoterol/ipratropium bromide on FEV1 and hyperinflation in Thai COPD patients. Chulalongkorn Medical Journal, Bangkok, Thailand, v. 65, n. 2, 2021. Disponível em: https://he05.tci-thaijo.org/index.php/CMJ/article/view/137. Acesso em: 6 dec. 2025.