Simulation Recording of an ECG, PCG, and PPG for Feature Extractions. Al-Khwarizmi Engineering Journal, [S. l.], v. 10, n. 4, p. 81–91, 2014. DOI: 10.22153/. Disponível em: https://alkej.uobaghdad.edu.iq/index.php/alkej/article/view/208. Acesso em: 31 mar. 2025.