Korzeniowska, A., G. Ręka, and H. Piecewicz-Szczęsna. “The Knowledge of Mothers in Poland on Measles and Its Prevention - a Survey Study”. Journal of Education, Health and Sport, vol. 10, no. 7, July 2020, pp. 105-18, doi:10.12775/JEHS.2020.10.07.011.