Setyawati, R., Nugraha, P. C., Ariswati, H. G. and Ahniar, N. H. (2020) “An Improved Measurement Accuracy of Fetal Heart Rate using Digital Filter”, Indonesian Journal of Electronics, Electromedical Engineering, and Medical Informatics, 2(3). doi: 10.35882/ijeeemi.v2i3.5.