Information and Communication Technologies : 9th Conference of Ecuador, TICEC 2021, Guayaquil, Ecuador, November 24-26, 2021, Proceedings - Salgado Guerrero, Juan Pablo; Berrezueta-Guzman, Santiago; Cerrada Lozada, Mariela; Chicaiza Espinosa, Janneth (Cham Springer International Publishing AG, 2021)