@conference{151416,
  author = {John Horst},
  title = {Coal extraction using RCS},
  year = {1993},
  month = {1993-01-01},
  publisher = {Proceedings of the 8th IEEE International Symposium on Intelligent Control, Chicago, IL},
  url = {https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=820452},
  language = {en},
}