Gupta, A. N., and K. K. Das. “A Double Blinded Randomized Study on Safety and Efficacy Between Ultra Sound Guided and Palpatory Methods of Axillary Brachial Plexus Block for Forearm Surgeries”. Asian Journal of Medical Sciences, vol. 8, no. 2, Mar. 2017, pp. 69-75, doi:10.3126/ajms.v8i2.15361.