Stocka, J., J. Simińska, W. Bukowska, P. Porzych, K. Ogurkowski, K. Nowacka, and W. Hagner. “Rating nurses’ Knowledge of Basic Steps of Cardiopulmonary Resuscitation”. Journal of Education, Health and Sport, vol. 8, no. 2, Jan. 2018, pp. 11-19, https://apcz.umk.pl/JEHS/article/view/5239.