1. Schuller DE, McGuirt WF, McCabe BF et al (1980) The prognostic significance of metastatic cervical lymph nodes. Laryngoscope 90: 557–570
2. O’Brien CJ, Smith JW, Soong SJ et al (1986) Neck dissection with and without radiotherapy: prognostic factors, patterns of recurrence and survival. Am J Surg 152:456–463
3. Ferito A, Robbins KT, Medina JE et al (2002) Is it time to eliminate confusion regarding cervical lymph node levels according to the scheme originated at the Memorial Sloan-Kettering Cancer Center? Acta Otolaryngol 122:805–807
4. Robbins KT, Clayman G, Levine PA et al (2002) Neck dissection classification update. Revisions proposed by the American Head and neck society and the American academy of otolaryngology-head and Neck surgery. Arch Otolaryngol Head Neck Surg 128: 751–758
5. Robbins KT, Shaha AR, Medina JE et al (2008) Consensus statement on the classification and terminology of neck dissection. Arch Otolaryngol Head Neck Surg 134:536–538