Shaikh, S. I., Mallappa, M., Joshi, V., & Sachidananda, R. (2019). Transdermal nitroglycerin as an adjuvant to intrathecal neostigmine and bupivacaine for prolongation of postoperative pain relief. Anaesthesia, Pain & Intensive Care, 22(4). Retrieved from https://apicareonline.com/index.php/APIC/article/view/1027