K. Goniewicz, P. Misztal-Okońska, P. Rzońca, K. Lulek, K. Bednarz, and M. Goniewicz, “Analysis of the effectiveness concerning initiatives for pedestrians’ safety on roads: a questionnaire survey”, Pol J Public Health, vol. 127, no. 4, pp. 164–167, Jul. 2018, doi: 10.1515/pjph-2017-0035.