“PHOTOACOUSTIC PHASE ANGLE FOR NONINVASIVE MONITORING OF MICROCIRCULATORY CHANGE IN HUMAN SKIN: A PRELIMINARY INVESTIGATION ”. Jurnal Teknologi 84, no. 4 (May 30, 2022): 159–166. Accessed May 3, 2024. https://journals.utm.my/jurnalteknologi/article/view/18005.