@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{compref146,
   author = {Grassberger,P},
   year = {1991},
   title = {Information and Complexity Measures in Dynamical Systems},
   booktitle = {Information Dynamics},
   editor = {Atmanspacher,H and Scheingraber,H},
   publisher = {Plenum Press},
   address = {New York},
   pages = {15-33}
}

@incollection{compref96,
   author = {Crutchfield,JP},
   year = {1991},
   title = {Reconstructing Language Hierarchies},
   booktitle = {Information Dynamics},
   editor = {Atmanspacher,H and Scheingraber,H},
   publisher = {Plenum Press},
   address = {New York},
   pages = {45-60}
}