Boros, Piotr. “The Combination of Olodaterol With Tiotropium in the Treatment of Chronic Obstructive Pulmonary Disease – According to Current Recommendations”. Medycyna Faktow (J EBM) 11, no. 3(40) (September 30, 2018): 170-173. Accessed May 18, 2024. https://www.journalsmededu.pl/index.php/jebm/article/view/2069.