TY  - RPRT
TI  - Direct aperture optimization for a variable aperture collimator for intensity-modulated radiation therapy.
AU  - S Webb
PY  - 2004
DO  - 10.1088/0031-9155/49/5/n02
UR  - https://pubmed.ncbi.nlm.nih.gov/15070210/
ID  - 15070210
ER  -