Gunasheela, K., and C.S. Sanikop. “A Prospective Randomized Double Blind Control Study of Duration of Analgesic Effect of Epidural Lignocaine 1.5% With Adrenaline and Neostigmine in Two Different Doses for Lower Abdominal Surgeries”. Karnataka Anaesthesia Journal, vol. 8, no. 1, Feb. 2007, pp. 8-12, http://karnatakaanesthesiajournal.in/index.php/kaj/article/view/143343.