[1]
L. Fritzsche, M. Fritzsche, and D. Majoe, “Optimi (Online Predicative Tools For Intervention In Mental Illness). Biofeedback Based On Heart Rate Variability As A Preventive Tool Against Stress-Related Disorders”, Psihìatr. nevrol. med. psihol., vol. 2, no. 2 (4), pp. 48–52, Aug. 2016.