1. Benzon H. Practical management of pain. Philadelphia: Mosby-Elsevier; 2014.
2. Canty D, Poon L. Superior laryngeal nerve block: an anatomical study comparing two techniques. J Clin Anesth. 2014;26:517–22.
3. Gray A. Atlas of ultrasound-guided regional anesthesia. Philadelphia: Elsevier; 2019.
4. Hagberg C, Benumof J, editors. Benumof and Hagberg’s airway management. Philadelphia: Saunders- Elsevier; 2013.
5. Waldman S. Atlas of interventional pain management. Philadelphia: Saunders-Elsevier; 2015.