Pilot study for estimating physical fatigue based on heart rate variability and reaction timeAllik, Ardo; Pilt, Kristjan; Viigimäe, Moonika; Fridolin, IvoXV Mediterranean Conference on Medical and Biological Engineering and Computing -MEDICON 2019 : proceedings of MEDICON 2019, September 26–28, 2019, Coimbra, Portugal2020 / p. 193-200 https://doi.org/10.1007/978-3-030-31635-8_23 Conference proceeding at Scopus Article at Scopus Article at WOS