Ambrosino, N., M. Di Giorgio, and A. Di Paco. “The Patients With Severe Chronic Obstructive Pulmonary Disease and Chronic Respiratory Insufficiency”. Monaldi Archives for Chest Disease 67, no. 3 (February 3, 2016). Accessed April 25, 2024. https://www.monaldi-archives.org/macd/article/view/486.