TY  - RPRT
TI  - Bandpass channels, zero-crossings, and early visual information processing.
AU  - D Marr
AU  - S Ullman
AU  - T Poggio
PY  - 1979
DO  - 10.1364/josa.69.000914
UR  - https://pubmed.ncbi.nlm.nih.gov/490228/
ID  - 490228
ER  -