Targan, Maria, Dariusz Świetlik, Aleksandra Kicińska, Karolina, and Tomasz. “Knowledge of University Students from the Metropolitan Area of Gdansk on Physiology of Procreative Health and Fertility Awareness-Based Methods)”. Quarterly Journal Fides et Ratio 35, no. 3 (September 30, 2018): 55–69. Accessed August 17, 2025. https://fidesetratio.com.pl/ojs/index.php/FetR/article/view/516.