@article{article552799a9,
title   = {Simultaneous Determination of Effective Energy and Exposure of X Ray Beams},
author = {Yoshimura, Elisabeth Mateus and Cruz, Marilia Teixeira da},
year = {1983},
doi = {10.1093/oxfordjournals.rpd.a082900},
journal   = {Radiation Protection Dosimetry}
}