Abraham, Ajith. ed., Shishir K. Shandilya ed., Laura Garcia-Hernandez ed., and Maria Leonilde Rocha Varela ed. <i>Hybrid Intelligent Systems: 19th International Conference On Hybrid Intelligent Systems (HIS 2019) ; Bhopal, India, December 10-12, 2019.</i> 1st edition 2021. Cham: Springer International Publishing, 2021.