Zahra, S.H. et al. 2018. Post-Operative Pain Comparison between Peri-Operative Bupivacaine Infiltration Vs Post-Operative Opioids Analgesics in Patient Undergoing Abdominal Surgery in First 6 Hours. The International Journal of Frontier Sciences. 2, 2 (Jul. 2018), 26–32. DOI:https://doi.org/10.37978/tijfs.v2i2.39.