@article{compref274,
   author = {Ray,TS},
   year = {1994},
   title = {Evolution, Complexity, Entropy and Artificial Reality},
   journal = {Physica D},
   volume = {75},
   pages = {239-263}
}

@article{compref180,
   author = {Kaneko,K and Tsuda,I},
   year = {1994},
   title = {Constructive Complexity and Artificial Reality: An Introduction},
   journal = {Physica D},
   volume = {75},
   pages = {1-10}
}

@article{compref695,
   author = {Crutchfield,JP},
   year = {1994},
   title = {The Calculi of Emergence: Computation, Dynamics and Induction},
   journal = {Physica D},
   volume = {75},
   pages = {11-54}
}

@article{compref224,
   author = {Machlin,R},
   year = {1990},
   title = {The Complex Behaviour of Simple Machines},
   journal = {Physica D},
   volume = {42},
   pages = {85-98}
}

@article{compref153,
   author = {Harnad,S},
   year = {1990},
   title = {The symbol grounding problem},
   journal = {Physica D},
   volume = {42},
   pages = {335-346}
}

@article{compref172,
   author = {Huberman,BA and Hogg,T},
   year = {1986},
   title = {Complexity and Adaption},
   journal = {Physica D},
   volume = {22},
   pages = {376-384}
}

@article{compref349,
   author = {Wolfram,S},
   year = {1984},
   title = {Universality and Complexity in Cellular Automata},
   journal = {Physica D},
   volume = {10},
   pages = {1}
}


