@book{compref30,
   author = {Badii,R and Politi,A},
   year = {1997},
   title = {Complexity: Hierarchical Structures and Scaling in Physics},
   publisher = {Cambridge University Press},
   address = {Cambridge}
}

@incollection{compref28,
   author = {Badii,R},
   year = {1992},
   title = {Complexity and Unpredicatable Scaling of Hierarchical Structures},
   booktitle = {Chaotic Dynamics, Theory and Practice},
   editor = {Bountis,T},
   publisher = {Plenum Press},
   address = {New York and London},
   pages = {1-19}
}

@incollection{compref29,
   author = {Badii,R and Finardi,M and Broggi,G},
   year = {1991},
   title = {Recursive symbolic Encoding and Hierarchical Description of Complex Systems},
   booktitle = {Information Dynamics},
   editor = {Atmanspacher,H and Scheingraber,H},
   publisher = {Plenum Press},
   address = {New York},
   pages = {35-43}
}

@incollection{compref27,
   author = {Badii,R},
   year = {1989},
   title = {Unfolding Complexity in Nonlinear Dynamical Systems},
   booktitle = {Measures of Complexity and Chaos},
   editor = {Abraham,NB et al},
   publisher = {Plenum Press},
   address = {New York},
   pages = {313-325}
}