BĄCZEK, Grażyna; PIETRZAK, Anita; TATAJ–PUZYNA, Urszula. Perception of natural methods of recognition of fertility by students of medical, technical and catholic universities. Quarterly Journal Fides et Ratio, [S. l.], v. 35, n. 3, p. 70–91, 2018. Disponível em: https://fidesetratio.com.pl/ojs/index.php/FetR/article/view/520. Acesso em: 5 dec. 2025.