Gdańska, P., I. Kiersnowska, J. Baranowska, M. Kotomska, and P. Węgrzyn. “ Puerperium and Other Selected Psychiatric Diseases”. Journal of Education, Health and Sport, vol. 9, no. 5, May 2019, pp. 304-9, https://apcz.umk.pl/JEHS/article/view/6928.