Placebo-controlled trials on the safety and efficacy of tiotropium bromide in patients with chronic obstructive pulmonary disease and bronchitis. International Journal of Life Sciences Biotechnology and Pharma Sciences, [S. l.], v. 21, n. 2, p. 10–22, 2025. Disponível em: https://ijlbps.net/index.php/ijlbps/article/view/191. Acesso em: 12 mar. 2026.