Łosień, T., Mędrak, A., Plaskacz, P., Bajerska, I., Reut, M., Dragon, E., Polko, M., & Cebula, A. (2017). Physical activity of pregnant and postpartum women. Journal of Education, Health and Sport, 7(5), 1011–1019. Retrieved from https://apcz.umk.pl/JEHS/article/view/5542