Hafifah, A. H. and Nazrul Anuar, N. (2020) “Methods of Extracting Feature from Photoplethysmogram Waveform for Non-Invasive Diagnostic Applications”, International Journal of Online and Biomedical Engineering (iJOE), 16(09), pp. pp. 39–62. doi: 10.3991/ijoe.v16i09.13577.