2020. Comparative Study of Small Dose Bupivacaine-fentanyl vs. Normal Dose of Bupivacaine in Spinal Anaesthesia for Patient Above 60 Years Old Undergoing Surgery. Medico Legal Update. 20, 4 (Nov. 2020), 1672–1676. DOI:https://doi.org/10.37506/mlu.v20i4.2080.