@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}
}