@book{
international2002iaea,
title={Calibration of Photon and Beta Ray Sources Used in Brachytherapy},
series={TECDOC Series},
number={1274},
year={2002},
url={http://www.dgdingfa.net/publications/6474/calibration-of-photon-and-beta-ray-sources-used-in-brachytherapy},
publisher={INTERNATIONAL ATOMIC ENERGY AGENCY},
address={Vienna}
}