@article{article2bc92373,
title   = {Reference range for cervical length in twin pregnancies},
author = {Fujita, Mariza Marie and Brizot, Maria L. and Liao, Adolfo W. and Bernath, Tatiana and Banduki Neto, Jorge D. and Zugaib, Marcelo},
year = {2002},
doi = {10.1034/j.1600-0412.2002.810910.x},
journal   = {Acta Obstetricia et Gynecologica}
}