@Article{	  dixoso99,
  author	= {J\"{u}rgen Dix and Mauricio Osorio},
  title		= {Confluent Rewriting Systems in Non-monotonic Reasoning},
  journal	= {Computacion y Sistemas},
  year		= {1999},
  volume	= {II},
  number	= {2-3},
  pages		= {104--123},
  issn          =  {1405-5546}
}