@Inproceedings{gruber94-ontology_engineering_mathematics,
  author = {Thomas R. Gruber and Gregory R. Olsen},
  title  = {An Ontology for Engineering Mathematics.},

  year   = {1994},
  number = {},
  url    = {ftp://ftp.ksl.stanford.edu/pub/KSL_Reports/KSL-94-18.ps.gz},

  const  = {\ text}
}