K. Gunasheela and C. 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”, kaj, vol. 8, no. 1, pp. 8–12, Feb. 2007.