Silva, Karla Kristine Dames, Agnaldo José Lopes, José Manoel Jansen, and Pedro Lopes de Melo. “ Total Inspiratory and Expiratory Impedance in Patients With Severe Chronic Obstructive Pulmonary Disease ”. Clinics 66, no. 12 (January 1, 2011): 2085–2091. Accessed July 3, 2024. https://revistas.usp.br/clinics/article/view/19333.