Pach-Gurgul, Agnieszka, and Marta Ulbrych. “Progress of the V4 Countries towards the EU’s Energy and Climate Targets in the Context of Energy Security Improvement”. Entrepreneurial Business and Economics Review 7, no. 2 (June 28, 2019). Accessed April 27, 2024. https://eber.uek.krakow.pl/eber/article/view/503.