TY  - RPRT
TI  - Calculating photon beam characteristics with Monte Carlo techniques.
AU  - W van der Zee
AU  - J Welleweerd
PY  - 1999
DO  - 10.1118/1.598694
UR  - https://pubmed.ncbi.nlm.nih.gov/10505877/
ID  - 10505877
ER  -