@book{compref309,
   author = {Sober,E},
   year = {1975},
   title = {Simplicity},
   publisher = {Clarendon Press},
   address = {Oxford}
}

@book{compref138,
   author = {Goodman},
   year = {1966},
   title = {The Structure of Appearence},
   publisher = {Bobbs-Merrill},
   address = {Indiapolis}
}

@article{compref186,
   author = {Kemeny,JG},
   year = {1955},
   title = {Two Measures of Complexity},
   journal = {The Journal of Philosophy},
   volume = {52},
   pages = {722-733}
}