@inbook{3504266, author={Christopher Robards, MD and Admir Hadzic, MD}, editor={Hadzic, Admir}, title={Chapter 47. Injection & Current Delivery Monitoring}, booktitle={NYSORA Textbook of Regional Anesthesia and Acute Pain Management}, publisher={The McGraw-Hill Companies}, address={New York, NY}, year={2007}, url={accessanesthesiology.mhmedical.com/content.aspx?aid=3504266} }