Fuzzy-Regulated Assistant based on Mental Engagement: A Multi-Agent Approach to Elderly Care. - María Isabel Ramírez Martínez; Carlos Lino Ramírez; Víctor Manuel Zamudio Rodríguez; David Asael Gutiérrez Hernández; Héctor José Puga Soberanes; Alfonso Rojas Domínguez (Intelligent Environments, 2021)