@misc{indiciaecf07873a9508,
  title = {Apparent relative motion from a checkerboard surround.},
  author = {B G Khang and E A Essock},
  year = {1997},
  doi = {10.1068/p260831},
  url = {https://pubmed.ncbi.nlm.nih.gov/9509137/},
  note = {Source identifier: 9509137}
}