@article{articlefbe023af,
title   = {Search for first harmonic modulation in the right ascension distribution of cosmic rays detected at the Pierre Auger Observatory},
author = {Abreu, P. and Souza, Vitor de and Gouffon, Philippe and Tridapalli, Diogo Bernardes},
year = {2011},
doi = {10.1016/j.astropartphys.2010.12.007},
journal   = {Astroparticle Physics}
}