Identification of the Anterior Psoas Sheath as a Landmark for Lumbar Sympathetic Block
Robert S. Sprague, Somayaji Ramamurthy
Regional Anesthesia: The Journal of Neural Blockade in Obstetrics, Surgery, & Pain Control Sep 1990, 15 (5) 253-255; DOI: 10.1136/rapm-00115550-199015050-00008
