Sun Ying, Cui Meizi and He Weida．Selection of Logistics Nodes in North-East China Based on Set Pair Analysis．Proceedings of 2010 International Conference of Logistics Engineering and Management．(EI).

Sun Ying, He Weida and Cui Meizi．Research on Ports Cooperation in China Tianjin and Hebei Area based on Set Pair Analysis．2010 International Conference in Management and Service Science(MASS 2010)(EI).