“HYPOBARIC BUPIVACAINE (WITH FENTANYL 25 MCG) FOR UNILATERAL SPINAL AN ANAESTHESIA IN HIP FRACTURE SURGERY: A DOSE-RESPONSE STUDY COMPARING TWO DOSAGES. 5 MG VERSUS 7.5 MG” (2022) Journal of Pharmaceutical Negative Results, pp. 2302–2311. doi:10.47750/pnr.2022.13.S04.284.