TY  - RPRT
TI  - Scotopic vision: an unexpected threshold elevation produced by dark annuli.
AU  - H J Wyatt
PY  - 1972
DO  - 10.1016/0042-6989(72)90064-8
UR  - https://pubmed.ncbi.nlm.nih.gov/4636128/
ID  - 4636128
ER  -