Quality of information and communications technology 12th International Conference, QUATIC 2019, Ciudad Real, Spain, September 11-13, 2019 : proceedings - Piattini, Mario 1966-; Cunha, Paulo Rupino da ca. 20./21. Jh; García Rodríguez de Guzmán, Ignacio; Pérez-Castillo, Ricardo (Communications in Computer and Information Science, 2019)