@misc{misce4de1978,
title   = {Endoscopy Ultra- Sonography –Guided Biliary Drainage in the Surgical –Endoscopy Era},
author = {Artifon, Everson L. A. and Otoch, Jose Pinhata and Figueiredo, Luiz F. Poli de and Sakai, Paulo and Rasslan, Samir},
year = {2011},
journal   = {Revista de Gastroenterología del Perú}
}