G. Bączek, A. Pietrzak, and U. Tataj–Puzyna, “Perception of natural methods of recognition of fertility by students of medical, technical and catholic universities”, FetR, vol. 35, no. 3, pp. 70–91, Sep. 2018, Accessed: Oct. 16, 2026. Available: https://fidesetratio.com.pl/ojs/index.php/FetR/article/view/520