TY  - RPRT
TI  - Integral arc illumination for projection perimeters.
AU  - L Frisén
PY  - 1969
DO  - 10.1111/j.1755-3768.1969.tb02517.x
UR  - https://pubmed.ncbi.nlm.nih.gov/5395861/
ID  - 5395861
ER  -