@article{article2f91bc50,
title   = {The exposure of the hybrid detector of the Pierre Auger Observatory},
author = {Abreu, P. and Souza, Vitor de and Gouffon, Philippe and Tridapalli, D B},
year = {2011},
doi = {10.1016/j.astropartphys.2010.10.001},
journal   = {Astroparticle Physics}
}