Stoleski, S., J. Minov, D. Mijakoski, and J. Karadzinska-Bislimovska. “Chronic Respiratory Symptoms and Lung Function in Agricultural Workers - Influence of Exposure Duration and Smoking”. Open Access Macedonian Journal of Medical Sciences, vol. 3, no. 1, Jan. 2015, pp. 158-65, doi:10.3889/oamjms.2015.014.