Observation of the February 2011 Forbush decrease by the EEE telescopes M. Abbrescia, S. Aiola, R. Antolini, C. Avanzini, R. Baldini Ferroli, G. Bencivenni, E. Bossini, E. Bressan, A. Chiavassa, C. Cicalo et al. (46 more) Eur. Phys. J. Plus, 126 7 (2011) 61 Published online: 13 July 2011 DOI: 10.1140/epjp/i2011-11061-5