M. Drwal, K. Głaszcz, A. Taracha, A. Krupa, O. Padała, and R. Maciejewski, “Prevention of STI and teenage pregnancies through sex education”, Pol J Public Health, vol. 126, no. 1, pp. 46–49, May 2016, doi: 10.1515/pjph-2016-0010.