Features of the energy spectrum of cosmic rays above 2.5 × 10^18 eV using the Pierre Auger Observatory - Aab, A.; Arbeletche, Luan Bonneau; Catalani, Fernando; Souza, Vitor de; Lang, Rodrigo Guedes; Martínez-Huerta, Humberto; Armand, Johnnier Pérez; Carvalho Junior, Washington Rodrigues de; Santos, Edivaldo Moura; Peixoto, Carlos Jose Todero (Physical Review Letters, 2020)