@article{walt:just05,
  author	= {Douglas Walton},
  title		= {Justification of Argument Schemes},
  journal	= {The Australasian Journal of Logic},
  year		= 2005,
  volume	= 3,
  pages		= {1-13},
  URL		= {http://www.philosophy.unimelb.edu.au/ajl/2005/},
}