@article{BrachmanSchmolze85,
  author	= {Brachman, Ronald J. and Schmolze, J.},
  year		= {1985},
  title		= {An Overview of the KL-ONE Knowledge Representation System},
  journal	= {Cognitive Science},
  volume	= {9},
  number	= {2},
  pages		= {171--216}
}