@misc{indiciaeca48096508c3,
  title = {When does illusory contour formation depend on contrast polarity?},
  author = {Branka Spehar and Colin W G Clifford},
  year = {2003},
  doi = {10.1016/s0042-6989(03)00274-8},
  url = {https://pubmed.ncbi.nlm.nih.gov/12831754/},
  note = {Source identifier: 12831754}
}