@article{articlea442fa20,
title   = {Evidence for a mixed mass composition at the 'ankle' in the cosmic-ray spectrum},
author = {Aab, A. and Albuquerque, Ivone Freire da Mota e and Souza, Vitor de and Gouffon, Philippe and Prado, R. R. and Peixoto, Carlos Jose Todero},
year = {2016},
doi = {10.1016/j.physletb.2016.09.039},
journal   = {Physics Letters B}
}