TY  - RPRT
TI  - A visual pigment with two physiologically active stable states.
AU  - P Hillman
AU  - S Hochstein
AU  - B Minke
PY  - 1972
DO  - 10.1126/science.175.4029.1486
UR  - https://pubmed.ncbi.nlm.nih.gov/5013683/
ID  - 5013683
ER  -