@misc{indiciaedd8fa597e87b,
  title = {Bandpass channels, zero-crossings, and early visual information processing.},
  author = {D Marr and S Ullman and T Poggio},
  year = {1979},
  doi = {10.1364/josa.69.000914},
  url = {https://pubmed.ncbi.nlm.nih.gov/490228/},
  note = {Source identifier: 490228}
}