@ARTICLE {33122,
author={L.M. Távora},
doi={10.1016/s0969-8043(97)00163-2},
journal={Applied Radiation and Isotopes},
title={On the potential of photon induced annihilation photons for inspection of engineering structures},
year={1997},
month={October},
volume={48},
number={10-12},
pages={1625-1633},
ISSN={0969-8043}
}