@misc{indiciae55f79a5be707,
  title = {Building validation tools for knowledge-based systems},
  author = {Stachowitz, R. A. and Chang, C. L. and Stock, T. S. and Combs, J. B.},
  year = {1987},
  url = {https://ntrs.nasa.gov/citations/19880007851},
  note = {Source identifier: 19880007851}
}