4Montoya J M, Sole B V. Small World Patterns in Food Webs[ R]. Santa Fe Institute, 2000, 00 - 10 - 059.
5Jeong H, Mason S P, Barabasi A L, et al. Lethality and centrality in protein networks[J]. Nature, 2001, 411:41 -42.
6Jeong H, Tombor B, Albert R. The large scale organization of metabolic networks[J]. Nature, 2000, 407:651-654.
7Faloutsos M, Faloutsos P, Faloutsos C. On power law relationships of the intemet topology[ J]. Computer Communication Review, 1999, 29(4) : 251 - 262.
8Serrano M A, Boguna M. Topology of the world trade web[J].Physical Review E, 2003, 68:015101 -015104.
9Li X, Jin Y Y, Chen G R. Complexity and synchronization of the world trade web[J]. Physica A, 2003, 328( 1 - 2) : 287 - 296.
10Gleditsch K S. Expanded trade and GDP data[J]. Journal of Conflict Resolution, 21X12, 46(5): 712- 724.
