@article{article96e2703b,
title   = {A least squares procedure for calculating the calibration constants of a portable gamma-ray spectrometer},
author = {Brenha-Ribeiro, Fernando and Carlos, Dionísio Uendro and Hiodo, Francisco Yukio and Strobino, E. F},
year = {2005},
doi = {10.1093/rpd/nch461},
journal   = {Radiation Protection Dosimetry}
}