1. Endoscopic ultrasonographic: a summary of the conclusions of the working party for the Tenth World Congress of Gastroenterology Los Angeles, California, 1994;Caletti;Am J Gastroenterol,1994
2. Major complications of endoscopic ultrasonography: results of a survey of 42.105 cases;Rösch;Gastrointest Endosc,1993
3. Apport de l'echoendoscopie en pathologie digestive. París: Andem. Service des Etudes;Roche;Janvier,1994
4. Endoscopic ultrasonography: the current status;Brugge;Gastroenterology,1998
5. Ultrasonografía endoscópica;Varas,1998