%0 Journal Article %A Pierre Billoir %A Paul Sommers %T Identification of the primary cosmic ray %J Comptes Rendus. Physique %D 2004 %P 495-503 %V 5 %N 4 %I Elsevier %R 10.1016/j.crhy.2004.03.011 %G en %F CRPHYS_2004__5_4_495_0