1、Identifying critical financial networks of the DJIA: Toward a network-based index
http://onlinelibrary.wiley.com/doi/10.1002/cplx.20315/abstract

2、
Network structure of the correlation between stock returnshttp://ieeexplore.ieee.org/xpl/login.jsp?tp=&arnumber=6000446&url=http%3A%2F%2Fieeexplore.ieee.org%2Fxpls%2Fabs_all.jsp%3Farnumber%3D6000446