Zalewa, P., Sagan, M., Jóźwik, B., & Gorbaniuk, O. (2011). The Evaluation of Instruments Responsible for Improvement of Regional Attractiveness for Investors in Chełm-Zamość Subregion. Regional Barometer. Analyses & Prognoses, (4 (22), 55–70. https://doi.org/10.56583/br.1358