1. Bergman RA, Thompson SA, Afifi AK, Saadeh FA (1988) Compendium of human anatomic variation: text, atlas, and world literature. Urban & Schwarzenberg, Baltimore
2. Blount RF, Lachman E (1953) The digestive system. In: Schaeffer JP (ed) Morris’ human anatomy, 11th edn. The Blakiston company, Toronto, pp 1292–1424
3. Cho JH, Kim JK, Lee H-Y, Yoon J-H (2013) Surgical anatomy of human soft palate. Laryngoscope 123:2900–2904
4. Choi D-Y, Bae J-H, Youn K-H, Kim H-J, Hu K-S (2014) Anatomical considerations of the longitudinal pharyngeal muscles in relation to their function on the internal surface of pharynx. Dysphagia 29:722–730
5. DuBrul EL (1988) Sicher and DuBrul’s oral anatomy, 8th edn. Ishiyaku Euro America, St. Louis