Development and Validation of an Affordable Wearable Multichannel EEG System With Active Electrodes and Innovative Flexible Headbands. - Daniel Antolínez; Ana Cisnal; Víctor Martínez-Cagigal; Eduardo Santamaría-Vázquez; Diego Benavides; Juan Granja; Juan C. Fraile; Roberto Hornero (IEEE Access, 2025)