Cosmic rays studied with a hybrid high school detector array A. Nigl, C. Timmermans, P. Schellart, J. Kuijpers, H. Falcke, A. Horneffer, C. M. de Vos, Y. Koopman, H. J. Pepping and G. Schoonderbeek Europhysics News, 38 5 (2007) 25-28 Published online: 04 October 2007 DOI: 10.1051/epn:2007021