Ly, Thi My Tien, et al. “THE RATE OF DIFFERENT TYPES OF PLACENTA PREVIA AND RESULTS OF PLACENTA PREVIA AT CAN THO GYNEOLOGY AND OBSTETRICS HOSPITAL IN 2019-2021”. Cantho Journal of Medicine and Pharmacy, no. 42, Oct. 2021, pp. 61-68, https://tapchi.ctump.edu.vn/index.php/ctump/article/view/1731.