Danting, Z., T. Tan, J. Zhongwei, X. Huichao, L. Xian, and W. Qing-Guo. “Modeling the Financial Market With Multiple Prices”. Transactions on Engineering and Computing Sciences, vol. 2, no. 5, Nov. 2014, pp. 41-51, doi:10.14738/tmlai.25.446.