Shaheen, Md Shafiul Alam, et al. “The Comparative Study of Epidural Levobupivacaine and Bupivacaine in Major Abdominal Surgeries in Type- 2 Diabetic Patient”. Journal of the Bangladesh Society of Anaesthesiologists, vol. 30, no. 1, Feb. 2017, pp. 5-13, doi:10.3329/jbsa.v30i1.65309.