@article{lang:class04,
  author	= {Bruce Langtry},
  title		= {The Classical and Maximin Versions of the Two-Envelope Paradox},
  journal	= {The Australasian Journal of Logic},
  year		= 2004,
  volume	= 2,
  pages		= {30--43},
  URL		= {http://www.philosophy.unimelb.edu.au/ajl/2004/},
}