@misc{misc305ee3e1,
title   = {Search for first harmonic modulation in the right ascension distribution of cosmic rays detected at the pierre auger observatory},
author = {Abreu, P and Albuquerque, Ivone Freire da Mota e and Gouffon, Philippe and Carvalho, W Rodrigues de and Tridapalli, D B},
year = {2011}
}