Iliescu, D. Antsaklis, P. Paulescu, D. Comanescu, A. Tudorache, S. Antsaklis, A. Ceausu, I. Novac, L. Cernea, N. Kurjak, A., Applications of ultrasound in prelabor and labor, Donald School Journal of Ultrasound in Obstetrics and Gynecology, (6), 257-269, 2012, Jaypee Brothers Medical Publishers (P) Ltd,