1. Wakisaka M, Mori H, Fuwa N, Matsumoto A. MR analysis of nasopharyngeal carcinoma: correlation of the pattern of tumor extent at the primary site with the distribution of metastasized cervical lymph nodes. Preliminary results. (2000) European radiology. 10 (6): 970-7.
2. Gross ND, Ellingson TW, Wax MK, Cohen JI, Andersen PE. Impact of retropharyngeal lymph node metastasis in head and neck squamous cell carcinoma. (2004) Archives of otolaryngology--head & neck surgery. 130 (2): 169-73.
3. Amatsu M, Mohri M, Kinishi M. Significance of retropharyngeal node dissection at radical surgery for carcinoma of the hypopharynx and cervical esophagus. (2001) The Laryngoscope. 111 (6): 1099-103.
4. Zhang GY, Liu LZ, Wei WH, Deng YM, Li YZ, Liu XW. Radiologic criteria of retropharyngeal lymph node metastasis in nasopharyngeal carcinoma treated with radiation therapy. (2010) Radiology. 255 (2): 605-12.
5. Rouviere H. Anatomy of the Human Lymphatic System: A Compendium. (1938).