@article{articlea10539aa,
title   = {Shower size parameter an estimator of extensive air shower energy in fluorescence telescopes},
author = {Souza, Vitor de and Medina Tanco, Gustavo Adolfo and Ortiz, Jeferson A and Sanchez, Federico},
year = {2006},
doi = {10.1103/physrevd.73.043001},
journal   = {Physical Review D}
}