Rao, B. D. and Prakash, K. C. (2016) “Comparative study of intrathecal bupivacaine 0.5% with bupivacaine 0.5% and buprenorphine low dose for postoperative analgesia in lower abdominal surgeries”, International Surgery Journal, 3(1), pp. 253–257. doi: 10.18203/2349-2902.isj20160237.