Kruszynski, W., Andraka, D., Kaźmierczak, B., Jaroszewicz, K. and Moskal, M. (2023) “Water age modeling as a tool to improve the quality and reduce the costs of water treatment in Polanica-Zdrój”, Economics and Environment, 86(3), pp. 436–452. doi: 10.34659/eis.2023.86.3.564.