@misc{misc504d3b3d,
title   = {Ultrasonographic and anatomopathologic correlactions in malignant tumors of biliary ducts},
author = {Cerri, Giovanni Guido and Alves, Venâncio Avancini Ferreira and Magalhães, Álvaro Eduardo de Almeida},
year = {1988},
booktitle   = {World Federation for Ultrasound in Medicine and Biology Meeting}
}