Muhammad Jamali, D. et al. (2022) “Efficacy of Spinal Epidural Anesthesia and Sub Diaphragmatic Lidocaine with Spinal Anesthesia in reduction of shoulder pain: Randomized Clinical trial: Efficacy of Spinal Epidural Anesthesia and Sub Diaphragmatic Lidocaine”, Pakistan BioMedical Journal, 5(5), pp. 282–287. doi:10.54393/pbmj.v5i5.468.