Surve, P.; Dsouza, N.; Patil, R.; Agrawal, D. N.; ., A. Effect of Low Dose Intrathecal Clonidine As an Adjuvant to Hyperbaric Bupivacaine on Postoperative Analgesia in Patients Undergoing Elective Infra Umbilical Surgeries. apic 2019, 22, 26-31.