@article{eprints1191,
          author = {Guido Caldarelli},
           title = {The mathematics of networks: the structure of social and biological systems},
            year = {2004},
          volume = {37},
          number = {3},
           month = {April},
         journal = {SIAM News},
       publisher = {SIAM},
             url = {http://eprints.imtlucca.it/1191/},
        abstract = {Network organization is just about universal in the real world}
}