Data-driven estimation of the invisible energy of cosmic ray showers with the Pierre Auger Observatory - Aab, A.; Albuquerque, Ivone Freire da Mota e; Catalani, Fernando; Kemmerich, Nikolas; Carvalho Junior, Washington Rodrigues de; Santos, Edivaldo Moura; Souza, Vitor de; Lang, Rodrigo Guedes; Prado, Raul Ribeiro; Peixoto, Carlos Jose Todero (Physical Review D, 2019)