@misc{indiciae74efb52e665a,
  title = {Electric Sail Propulsion for Exploring Nearby Interstellar Space},
  author = {Johnson, Les and Wiegmann, Bruce and Bangham, Mike},
  year = {2015},
  url = {https://ntrs.nasa.gov/citations/20150022342},
  note = {Source identifier: 20150022342}
}