@misc{indiciae7e1784650485,
  title = {Additional Twists on A Continuous Barber - Pole Illusion},
  author = {Mulligan, J. B. and Beutter, B. R. and Statler, Irving C.},
  year = {1994},
  url = {https://ntrs.nasa.gov/citations/20010045534},
  note = {Source identifier: 20010045534}
}