@article{compref154,
   author = {Hawrnack,J and Zygmunt,J},
   year = {1981},
   title = {On the Degree of Complexity of Sentential Logics},
   journal = {Studia Logica},
   volume = {4},
   pages = {142-153}
}

@book{compref257,
   author = {Perlis,A and Sayward,F and Shaw,M (Eds.)},
   year = {1981},
   title = {Software Metrics},
   publisher = {MIT},
   address = {}
}

@article{compref620,
   author = {Henry,S and Kafura,K},
   year = {1981},
   title = {Software Structure Metrics based on Information Flow},
   journal = {IEEE Transactions on Software Engineering},
   volume = {7(5)},
   pages = {510-518}
}

@book{compref321,
   author = {Temperly,HNV},
   year = {1981},
   title = {Graph Theory and Applications},
   publisher = {Ellis Horwood},
   address = {Chichister}
}

@incollection{compref306,
   author = {Simon,HA},
   year = {1981},
   title = {The Architecture of Complexity},
   booktitle = {The Sciences of the Artificial},
   editor = {   publisher = {MIT Press},
   address = {Cambridge, Massachusetts},
   pages = {192-229}
}

@article{compref295,
   author = {Saunders,PT and Ho,MW},
   year = {1981},
   title = {On the Increase in Complexity in Evolution},
   journal = {Journal of Theoretical Biology},
   volume = {90},
   pages = {515-530}
}

@article{compref75,
   author = {Cavallo,RE and Klir,GJ},
   year = {1981},
   title = {Reconstructability Analysis: Overview and Bibliography},
   journal = {International Journal of General Systems},
   volume = {7},
   pages = {1-6}
}

@article{compref2,
   author = {Aaderaa,SO and B”rger,E},
   year = {1981},
   title = {The equivalence of Horn and network complexity of Boolean functions},
   journal = {Acta Informatica},
   volume = {15},
   pages = {303-307}
}

@article{compref300,
   author = {Shapiro,S},
   year = {1981},
   title = {Understanding Church's Thesis},
   journal = {Journal of Philosophical Logic},
   volume = {10},
   pages = {353-365}
}

@article{compref244,
   author = {Naylor,AW},
   year = {1981},
   title = {On Decomposition Theory: Generalised Dependance},
   journal = {IEEE Transactions on Systems, Man and Cybernetics},
   volume = {10},
   pages = {699-713}
}