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   author = {Wimsatt,W},
   year = {1972},
   title = {Complexity and Organisation},
   booktitle = {Studies in the Philosophy of Sciences},
   editor = {Schaffner,K and Cohen,R},
   publisher = {Reidel},
   address = {Dordretch},
   pages = {67-86}
}

@article{compref115,
   author = {Feldman,JA},
   year = {1972},
   title = {Some decidability results on grammatical inference and complexity},
   journal = {Information and Control},
   volume = {20},
   pages = {244-262}
}

@article{compref89,
   author = {Conant,RC},
   year = {1972},
   title = {Detecting subsystems of a complex system},
   journal = {IEEE Transactions on Systems, Man and Cybernetics},
   volume = {2},
   pages = {550-553}
}

@article{compref646,
   author = {Anderson,PW},
   year = {1972},
   title = {More is Different},
   journal = {Science},
   volume = {177},
   pages = {393-396}
}