Zielińska-Sitkiewicz, M. (2021). THE FLU: AN ANALYSIS OF ECONOMIC COSTS AND MORBIDITY RATES IN POLAND IN THE PERIOD 2013–2019 USING ADAPTIVE PREDICTION METHODS. Acta Scientiarum Polonorum. Oeconomia, 19(4), 139-146. https://doi.org/10.22630/ASPE.2020.19.4.50