Inal-Ince, Deniz, Sema Savci, Melda Saglam, Ebru Calik, Hulya Arikan, Meral Bosnak-Guclu, Naciye Vardar-Yagli, and Lutfi Coplu. “Fatigue and Multidimensional Disease Severity in Chronic Obstructive Pulmonary Disease”. Multidisciplinary Respiratory Medicine 5, no. 1 (February 10, 2010). Accessed July 7, 2024. https://mrmjournal.org/index.php/mrm/article/view/523.