@misc{indiciae534c69273801,
  title = {The Io sulfur torus in 1981},
  author = {Oliversen, Ronald J. and Scherb, Frank and Roesler, Fred L.},
  year = {1991},
  url = {https://ntrs.nasa.gov/citations/19910067056},
  note = {Source identifier: 19910067056}
}