2DeFriend DE. Dubbins PA. Sonographic demonstration of a pharyugoesophageal diverticulum. J Clin Uhrasound, 2000, 28: 485-487.
3Komatsu M. Komatsu T, Inove K. Uhrasonography of Zenker's diverticulum: special reference to differential diagnosis from thyroid nodules. Eur J Uhrasound, 2000, 11:123-125.