Kluczkowski, Andrzej, and Michał Wyrostkiewicz. “Circular Economy As an Important Subject of Environmental Education in the Era of Energy Demand ”. Journal of Vasyl Stefanyk Precarpathian National University, vol. 5, no. 1, Apr. 2018, pp. 88-94, doi:10.15330/jpnu.5.1.88-94.