Putra, F., S. Mandala, and M. Pramudyo. “A Study of Feature Selection Method to Detect Coronary Heart Disease (CHD) on Photoplethysmography (PPG) Signals”. Building of Informatics, Technology and Science (BITS), Vol. 4, no. 2, Sept. 2022, p. 1018−1026, doi:10.47065/bits.v4i2.2259.