Regional Anesthesia: The Journal of Neural Blockade in Obstetrics, Surgery, & Pain Control Jan 1990, 15 (1) 19-25; DOI: 10.1136/rapm-00115550-199015010-00006
Regional Anesthesia: The Journal of Neural Blockade in Obstetrics, Surgery, & Pain Control Oct 1982, 7 (Suppl 4) S156-S162; DOI: 10.1136/rapm-00115550-198207041-00021