Current methods of non-invasive fetal heart rate surveillance
A. Theodoridou, A. Athanasiadis, G. Tsakmakidis, Ι. Tsakiridis, A. Pilavidi, C. Vosnakis, T. Dagklis, G. Mavromatidis, A. Mamopoulos
Clinical and Experimental Obstetrics & Gynecology . 2020, (4): 459 -464 .  DOI: 10.31083/j.ceog.2020.04.5422