Low dose lignocaine + butorphanol vs. low dose bupivacaine for spinal anaesthesia in day care urological surgeries: a prospective randomized control trial
Shahil Rameshbhai Khant, Rajeev Chaudhari, Rishikesh Arun Kore, Shirish Bhagwat, Ranjan Purushottam Jakhalekar
(Urol Res Pract 2017; 43: 189-195) DOI: 10.5152/tud.2017.14367