Reddy, B. Srinivasulu, and G. Pratapa Reddy. 2019. “Efficacy of Ketamine Hcl and Tramadol Hcl by Epidural Route for Lower Abdominal Surgeries”. International Journal of Advances in Medicine 6 (4):1188-92. https://doi.org/10.18203/2349-3933.ijam20193269.