Regional Anesthesia: The Journal of Neural Blockade in Obstetrics, Surgery, & Pain Control Jan 1990, 15 (1) 15-18; DOI: 10.1136/rapm-00115550-199015010-00005
Regional Anesthesia: The Journal of Neural Blockade in Obstetrics, Surgery, & Pain Control Apr 1983, 8 (2) 74-80; DOI: 10.1136/rapm-00115550-198308020-00007