Vilmann P, Jacobson GK, Henriksen FW et al: Endoscopic ultrasonography with guided fine-needle aspiration biopsy in pancreatic diseases. Gastrointest Endosc 38: 172-173, 1992
Tin TL, Sie LH, Tytgat GNJ: Endosonography and cytology in diagnosis and staging pancreatic body and tail carcinoma. Preliminary results of endosonograhic guided puncture. Dig Dis Sci 38: 59-64, 1993