@article{eprints1164,
          author = {Guido Caldarelli and Riccardo Marchetti and Luciano Pietronero},
           title = {The fractal properties of Internet},
            year = {2000},
          volume = {52},
          number = {4},
           month = {September},
         journal = {EPL (Europhysics Letters)},
       publisher = {IOPscience},
           pages = {386--391},
        keywords = {PACS: 92.40.Fb Rivers, runoff, and streamflow; 05.10.-a Computational methods in statistical physics and nonlinear dynamics; },
        abstract = {In this paper we show that the Internet web, from a user's perspective, manifests robust scaling properties of the type P(n) propto n?{\ensuremath{\tau}}, where n is the size of the basin connected to a given point, P represents the density of probability of finding n points downhill and {\ensuremath{\tau}} = 1.9 {$\pm$} 0.1 s a characteristic universal exponent. This scale-free structure is a result of the spontaneous growth of the web, but is not necessarily the optimal one for efficient transport. We introduce an appropriate figure of merit and suggest that a planning of few big links, acting as information highways, may noticeably increase the efficiency of the net without affecting its robustness.},
             url = {http://eprints.imtlucca.it/1164/}
}