Time variations in the deep underground muon flux S. Cecchini, M. Cozzi, H. Dekhissi, J. Derkaoui, G. Giacomelli, M. Giorgini, F. Maaroufi, G. Mandrioli, A. Margiotta, A. Moussa et al. (5 more) EPL, 87 3 (2009) 39001 Published online: 04 August 2009 DOI: 10.1209/0295-5075/87/39001