Universal core modules govern the dynamics of cellular regulatory   networks
  This paper contains some immature results. It have been withdrawn. 
Jing-Jing Li, Jie Ren, Zhi Liang, Meng Xu, Dan Xie, De-Shuang Huang,   Bing-Hong Wang, Liwen Niu, Huanqing Feng, Wen-Xu Wang