K. Piasecka, E. Ślizień-Kuczapska, M. Pytka, P. Łyszczarz, and M. Bieniak-Czerepak, “Assessment of menstrual cycle self-observation skills using the double-check symptom-thermal method based on chart evaluation”, FeR, vol. 55, no. 3, pp. 9–18, Sep. 2023, doi: 10.34766/fetr.v55i3.1211.