MARTA: a high-energy cosmic-ray detector concept for high-accuracy muon measurement P. Abreu, S. Andringa, P. Assis, A. Blanco, V. Barbosa Martins, P. Brogueira, N. Carolino, L. Cazon, M. Cerda, G. Cernicchiaro et al. (35 more) Eur. Phys. J. C, 78 4 (2018) 333 Published online: 24 April 2018 DOI: 10.1140/epjc/s10052-018-5820-2