Zielińska-Sitkiewicz, Monika. “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, no. 4 (December 30, 2020): 139–146. Accessed November 22, 2024. https://aspe.sggw.edu.pl/article/view/86.