Dang Nguyen Huynh, Thao Nguyen Tran, Khang Thanh Tran, Nguyen Khoa Le, Cao Dang Le, Huu-Xuan Mai, Quang-Linh Huynh, Trung-Hau Nguyen. "Assessment of cognitive load through photoplethysmography and bioimpedance responses during mental arithmetic tasks." Scientific Reports, 2026. doi:10.1038/s41598-026-38782-3