Obojski, A. “Inhaled Corticosteroids and Long-Acting ?2-Agonists in Asthma and COPD Treatment. Fluticasone Propionate and Salmeterol for Long-Term Control of Asthma and COPD”. Medycyna Faktow (J EBM), Vol. 10, no. 4(37), Dec. 2017, pp. 302-5, doi:10.24292/01.MF.0417.1.