[2] viXra:1807.0076 submitted on 2018-07-03 23:52:47, (60 unique-IP downloads)
Authors: Wang Xin, Li Wanxian
Category: Economics and Finance
[1] viXra:1706.0220 submitted on 2017-06-13 02:20:44, (66 unique-IP downloads)
Authors: Wu Hao, Tian Guohui, Pan Chunwei, Wang Xin, Yu Jinshan
Category: General Mathematics