N.A. Salleh, M. Balakrishnan, A.C. Whitttaker "Stress Response Index for Traumatic Childhood Experience Based on the Fusion of Hypothalamus Pituitary Adrenocorticol and Autonomic Nervous System Biomarkers", Advances in Science, Technology and Engineering Systems Journal, vol. 5, no. 1, pp. 317-324 (2020).