1.
Stelmach A, Wanot B, Biskupek-Wanot A. CHRONIC OBSTRUCTIVE PULMONARY DISEASE (COPD) – AN UNDERESTIMATED PROBLEM. SJPU [Internet]. 2016Nov.11 [cited 2024Jul.17];17(2):69-. Available from: http://pnap.ap.edu.pl/index.php/pnap/article/view/75