Neprytskyi, Oleksandr, et al. “Regional Contract in the Implementation of the EU Regional Policy in Poland (2001-2013)”. Scientific Papers of the Vinnytsia Mykhailo Kotsyiubynskyi State Pedagogical University Series History, no. 52, June 2025, pp. 117-23, https://doi.org/10.31652/2411-2143-2025-52-117-123.