Yadav, RK, et al. “Effectiveness of Addition of Neostigmine or Dexamethasone to Local Anaesthetic in Providing Perioperative Analgesia for Brachial Plexus Block: A Prospective, Randomized, Double Blinded, Controlled Study”. Kathmandu University Medical Journal, vol. 6, no. 3, Apr. 2009, pp. 302-9, doi:10.3126/kumj.v6i3.1704.