“A Comparative Study Of Ultrasound Guided Pericapsular Nerve Group [Peng] Block Versus Suprainguinal Fascia Iliaca Compartment [Sifi] Block Using Ropivacaine In Patients With Fracture Femur For Reducing Pain Associated With Positioning For Subarachnoid Blo”, Int. J. Environ. Sci., pp. 2484–2489, Sep. 2025, doi: 10.64252/1rgtra04.