Atmospheric monitoring with LIDARs at the Pierre Auger Observatory V. Rizi, A. Tonachini, Pierre Auger Collaboration, M. Iarlori and G. Visconti Eur. Phys. J. Plus, 127 8 (2012) 92 Published online: 28 August 2012 DOI: 10.1140/epjp/i2012-12092-0