- Enrique A. de la Cal, José Ramón Villar Flecha, Héctor Quintián, Emilio Corchado, editors, Hybrid Artificial Intelligent Systems - 15th International Conference, HAIS 2020, Gijón, Spain, November 11-13, 2020, Proceedings. Volume 12344 of Lecture Notes in Computer Science, Springer, 2020.