TY  - RPRT
TI  - Threshold values and the psychophysical function in brightness vision.
AU  - G Ekman
AU  - U Gustafsson
PY  - 1968
DO  - 10.1016/0042-6989(68)90047-3
UR  - https://pubmed.ncbi.nlm.nih.gov/5729915/
ID  - 5729915
ER  -