Yazdani-Chamzini, A., Yakhchali, S. H., Volungevičienė, D. and Zavadskas, E. K. (2012) “Forecasting gold price changes by using adaptive network fuzzy inference system”, Journal of Business Economics and Management, 13(5), pp. 994-1010. doi: 10.3846/16111699.2012.683808.