Bączek, G., Pietrzak, A. and Tataj–Puzyna, U. (2018) “Perception of natural methods of recognition of fertility by students of medical, technical and catholic universities”, Quarterly Journal Fides et Ratio, 35(3), pp. 70–91. Available at: https://fidesetratio.com.pl/ojs/index.php/FetR/article/view/520 (Accessed: 17 August 2025).