Regional Anesthesia: The Journal of Neural Blockade in Obstetrics, Surgery, & Pain Control Jan 1982, 7 (1) 20-25; DOI: 10.1136/rapm-00115550-198207010-00007
Ram S.Ravindran, Oscar J.Viegas, Karen L.Pantazis, Susan J.Baldwin
Regional Anesthesia: The Journal of Neural Blockade in Obstetrics, Surgery, & Pain Control Jan 1983, 8 (1) 6-9; DOI: 10.1136/rapm-00115550-198308010-00002