@inproceedings{Fikes-etal97,
  author	= {Fikes, Richard and Farquhar, Adam and Rice, James},
  title		= {Tools for Assembling Modular Ontologies in Ontolingua},
  booktitle	= {Proceedings of AAAI/IAAI 1997},
  pages		= {436--441},
  year		= {1997}
}