Kurach, Radosław. “Stocks, Commodities and Business Cycle Fluctuations – Seeking the Diversification Benefits”. Equilibrium. Equilibrium. Quarterly Journal of Economics and Economic Policy 7, no. 4 (December 31, 2012): 101–116. Accessed July 23, 2024. https://apcz.umk.pl/EQUIL/article/view/EQUIL.2012.029.