Methods and approaches on inferring human emotional stress changes through physiological signals: a review. - Siao Zheng Bong; M. Murugappan; Sazali Yaacob (Int. J. Medical Eng. Informatics, 2013)

Implementation of wavelet packet transform and non linear analysis for emotion classification in stroke patient using brain signals. - Siao Zheng Bong; Wan Khairunizam; M. Murugappan; Norlinah Mohamed Ibrahim; Yuvaraj Rajamanickam; Khairiyah Mohamad (Biomed. Signal Process. Control., 2017)