TY  - RPRT
TI  - Edge detectors in human vision.
AU  - R M Shapley
AU  - D J Tolhurst
PY  - 1973
DO  - 10.1113/jphysiol.1973.sp010133
UR  - https://pubmed.ncbi.nlm.nih.gov/4689964/
ID  - 4689964
ER  -