Arefi Shirvan, Reza, Seyed Kamaledin Setaredan, and Ali Motie Nasrabadi. 2018. “Classification of Mental Stress Levels by Analyzing FNIRS Signal Using Linear and Non-Linear Features”. International Clinical Neuroscience Journal 5 (2):55-61. https://journals.sbmu.ac.ir/neuroscience/article/view/21016.