@misc{indiciae1cb116a1bc48,
  title = {An Object-oriented Query Processor that Produces Monotonically Improving Approximate Answers},
  author = {Vrbsky, S. V. and Liu, Jane W. S.},
  year = {1991},
  url = {https://ntrs.nasa.gov/citations/19970001656},
  note = {Source identifier: 19970001656}
}