MARCHON, Niyan; NAIK, Gourish. Linear phase FIR filter to compute fetal heart rate variability. International Journal of Engineering and Technology, [S. l.], v. 7, n. 4.5, p. 492–496, 2018. DOI: 10.14419/ijet.v7i4.5.21141. Disponível em: https://mail.sciencepubco.com/index.php/IJET/article/view/21141.. Acesso em: 17 aug. 2025.