Mostafa, T. A. H., M. B. El Mourad, and N. K. Mohamed. “Pericapsular Nerve Group Block in Hip Arthroplasty: A Prospective Randomized Trial”. Journal of Opioid Management, vol. 19, no. 4, Aug. 2023, pp. 313-20, doi:10.5055/jom.2023.0788.