Krawczyk, Jakub, and Szymon Filipczak. “Investments and Long-Term Real Interest Rate in Poland. Study of Investment Structure, Current Account and Their Correlation With Long-Term Real Interest Rates”. Economics and Business Review, vol. 1, no. 2, June 2015, pp. 130-48, https://doi.org/10.18559/ebr.2015.2.7.