@article{article9903e5cd,
title   = {An overview of doses to patients and irradiation conditions of diagnostics chest X ray examinations carried out in hospitals of the city of Sao Paulo, Brazil},
author = {Freitas, M. B. and Yoshimura, Elisabeth Mateus},
year = {2003},
doi = {10.1093/oxfordjournals.rpd.a006125},
journal   = {Radiation Protection Dosimetry}
}