TY  - RPRT
TI  - Perceptual spatial frequency--orientation surface: psychophysics and line element theory.
AU  - B Treutwein
AU  - I Rentschler
AU  - T Caelli
PY  - 1989
DO  - 10.1007/bf00204126
UR  - https://pubmed.ncbi.nlm.nih.gov/2706283/
ID  - 2706283
ER  -