Zwierzyńska, A. et al. 2022. Assessment of the level of knowledge about health behaviors and puerperium of various social groups in the Świętokrzyskie Voivodeship during the Covid-19 pandemic. Journal of Education, Health and Sport. 12, 2 (Feb. 2022), 56–68. DOI:https://doi.org/10.12775/JEHS.2022.12.02.006.