@incollection{compref647,
   author = {Ray,TS},
   year = {1994},
   title = {Evolution and Complexity},
   booktitle = {Complexity: Metaphors, Models and REality},
   editor = {Cowan,G and Pines,D and Meltzer,D},
   publisher = {Addison-Wesley},
   address = {Reading, MA},
   pages = {161-173}
}