Yadav, Isha, Savita Gupta, and C. K. Dua. 2019. “Comparative Evaluation of Clinical Efficacy of Intrathecal Isobaric Levobupivacaine and Isobaric Bupivacaine in Patients Undergoing Infra-Umbilical Surgery”. Anaesthesia, Pain & Intensive Care, January, 303-8. https://www.apicareonline.com/index.php/APIC/article/view/210.