1. Cervical plexus blockade;Pappas,1996
2. Head and neck regional blocks;Tucker,1996
3. Techniques of regional anesthesia in adults. Clinical practice of regional anesthesia;Raj,1991
4. Somatic blockade of head and neck;Murphy,1998
5. Interscalene cervical plexus block: a single injection technique;Winnie;Anesth Analg,1975