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Song et al. [Self-similarity of complex networks, Nature 433 (2005) 392–395] have recently used a version of the box-counting method, called the node-covering method, to quantify the self-similar properties of 43 cellular networks: the minimal number NV of boxes of size ℓ needed to cover all the nodes of a cellular network was found to scale as the power-law NV∼(ℓ+1)-DV with a fractal dimension DV=3...
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