Jakovljevic, Mihajlo B, Zorica Lazic, Nick Verhaeghe, Slobodan Jankovic, Olgica Gajovic, and Lieven Annemans. “Direct Medical Costs of COPD Diagnosis and Treatment, Eastern Vs Western European Country – Examples of Serbia and Belgium”. Farmeconomia. Health economics and therapeutic pathways 14, no. 4 (December 18, 2013): 161–168. Accessed July 23, 2025. https://provafe.seedstm.com/index.php/FE/article/view/676.