Gupta, B.; Gupta, A.; Verma, R. K.; Shah, P. Comparative Study of Dexmedetomidine and Clonidine As an Adjunct to Levobupivacaine in Transversus Abdominis Plane Block in Patients Undergoing Total Abdominal Hysterectomy: A Randomized Control Study. Int J Reprod Contracept Obstet Gynecol 2019, 8, 3991-3995.