@inproceedings{inproceedings7a0bc8ac,
title   = {Ultrasound evaluation of placentation in twin pregnancies},
author = {Berezowski, Aderson Tadeu and Costa, F. S. and Fortunato, G. G. and Resende, A. V. and Machado, J. C. and Dib, F. R. and Duarte, Geraldo and Cunha, Sérgio Pereira da},
year = {1999},
booktitle   = {World Congress of Perinatal Medicine}
}