Regional Anesthesia: The Journal of Neural Blockade in Obstetrics, Surgery, & Pain Control Oct 1986, 11 (4) 171-175; DOI: 10.1136/rapm-00115550-198611040-00007
Regional Anesthesia: The Journal of Neural Blockade in Obstetrics, Surgery, & Pain Control Jul 1983, 8 (3) 99-103; DOI: 10.1136/rapm-00115550-198308030-00002