@article{Lopez-etal99,
  author	= {Lopez, M. F. and Gomez-Perez, A. and Sierra, J. P. and Sierra, A. P.},
  title		= {Building a chemical ontology using Methontology and the Ontology Design Environment},
  journal	= {IEEE Intelligent Systems},
  year		= {1999},
  month		= janfeb,
  volume	= {14},
  number	= {5},
  pages		= {37--45}
}