Xiaodong Li, Haoran Xie, Ran Wang, Yi Cai, Jingjing Cao, Feng Wang, Huaqing Min, Xiaotie Deng,
Empirical analysis: stock market prediction via extreme learning machine Neural Computing and Applications. ,vol. 27, pp. 67- 78 ,(2016) ,
10.1007/S00521-014-1550-Z