A. J. Rayamajhi, P. Paudel, S. C. Paudel, B. K. Dhungel, and R. K. Yadav, “Ultrasound guided peripheral nerve block as alternative to subarachnoid block in total hip replacement arthroplasty: a retrospective study”, JCMC, vol. 9, no. 4, pp. 43–46, Dec. 2019.