Haslam, L., A. Lansdown, J. Lee, and M. van der Vyver. “Survey of Current Practices: Peripheral Nerve Block Utilization by ED Physicians for Treatment of Pain in the Hip Fracture Patient Population”. Canadian Geriatrics Journal, vol. 16, no. 1, Dec. 2012, pp. 16-21, doi:10.5770/cgj.16.52.