Regional Anesthesia: The Journal of Neural Blockade in Obstetrics, Surgery, & Pain Control Jan 1989, 14 (1) 35-42; DOI: 10.1136/rapm-00115550-198914010-00009
Regional Anesthesia: The Journal of Neural Blockade in Obstetrics, Surgery, & Pain Control Mar 1992, 17 (2) 91-94; DOI: 10.1136/rapm-00115550-199217020-00006
Regional Anesthesia: The Journal of Neural Blockade in Obstetrics, Surgery, & Pain Control Oct 1982, 7 (Suppl 4) S105-S109; DOI: 10.1136/rapm-00115550-198207041-00013