Wróblewski, Hubert, Dariusz Chojęta, Aleksandra Zimna, Ewelina Zygmunt, and Barbara Maziarz. 2020. “Hygiene Behaviour Among Youths before and During the COVID-19 Pandemic”. Journal of Education, Health and Sport 10 (8):199-203. https://doi.org/10.12775/JEHS.2020.10.08.023.