Shaikh, Safiya I., Marutheesh Mallappa, Vikas Joshi, and Roopa Sachidananda. 2019. “Transdermal Nitroglycerin As an Adjuvant to Intrathecal Neostigmine and Bupivacaine for Prolongation of Postoperative Pain Relief”. Anaesthesia, Pain & Intensive Care 22 (4). https://apicareonline.com/index.php/APIC/article/view/1027.