Testing the correlation between mean reversion process and grey system theory for metal price forecasting: Test korelacije između procesa povratka na srednju vrednost i teorije sivog sistema u svrhu prognoze cene metala. ume [Internet]. 2017 Mar. 19 [cited 2026 Nov. 14];(24):61-7. Available from: https://ume.rgf.bg.ac.rs/index.php/ume/article/view/44