@incollection{compref283,
   author = {Rosen,R},
   year = {1977},
   title = {Complexity and system descriptions},
   booktitle = {Systems: Approaches, theories, Applications},
   editor = {Harnett,WE},
   publisher = {D.Reidel},
   address = {Dordrecht, Holland},
   pages = {169-175}
}