Torres, Antoni, Ernesto Crisafulli, Enric Barbeta, and Antonella Ielpo. “Management of Severe Acute Exacerbations of COPD: An Updated Narrative Review”. Multidisciplinary Respiratory Medicine 13, no. 1 (October 2, 2018). Accessed July 7, 2024. https://mrmjournal.org/index.php/mrm/article/view/188.