TY  - RPRT
TI  - A pencil beam model for photon dose calculation.
AU  - A Ahnesjö
AU  - M Saxner
AU  - A Trepp
DO  - 10.1118/1.596856
UR  - https://pubmed.ncbi.nlm.nih.gov/1584117/
ID  - 1584117
ER  -