HE, Kai. The description of the development of the photoelectric sensors in detecting heart sound lesions. Science and Technology of Engineering, Chemistry and Environmental Protection, [S. l.], v. 2, n. 6, p. 7872, 2024. DOI: 10.61173/6f61g721. Disponível em: https://stecep.deanfrancis.press/article/view/1361. Acesso em: 24 oct. 2026.