@misc{indiciae8369cd268b3d,
  title = {Monophasic temporal modulation increases apparent spatial frequency.},
  author = {V Virsu and G Nyman},
  year = {1974},
  doi = {10.1068/p030337},
  url = {https://pubmed.ncbi.nlm.nih.gov/4459829/},
  note = {Source identifier: 4459829}
}