TY  - RPRT
TI  - Calculating output factors for photon beam radiotherapy using a convolution/superposition method based on a dual source photon beam model.
AU  - H H Liu
AU  - T R Mackie
AU  - E C McCullough
PY  - 1997
DO  - 10.1118/1.598111
UR  - https://pubmed.ncbi.nlm.nih.gov/9434980/
ID  - 9434980
ER  -