Kapka-Skrzypczak, L., Cyranka, M. and Wojtyła, A. (2011) “Legal highs as an urgent issue of public health”, Polish Journal of Public Health, 112(2), pp. 174–180. Available at: https://czasopisma.umlub.pl/pjph/article/view/1952 (Accessed: 3 August 2025).