Leziak, Milena, Sylwiusz Niedobylski, Klaudia Żak, Michał Piwoński, Danuta Krasowska, and Katarzyna Skórzyńska-Dziduszko. 2020. “Oxytocin and Postpartum Depression - a Possible Treatment for Depressed Mothers”. Journal of Education, Health and Sport 10 (7):161-72. https://doi.org/10.12775/JEHS.2020.10.07.016.