Abayomi, Abdultaofeek, et al. “Recognition of Human Emotion Using Radial Basis Function Neural Networks With Inverse Fisher Transformed Physiological Signals”. International Journal of Integrated Engineering, vol. 13, no. 6, Aug. 2021, pp. 1-26, https://publisher.uthm.edu.my/ojs/index.php/ijie/article/view/5243.