Agarwal, S.; Singh, R. B.; Singh, D.; Kumar, M.; Mishra, P. K.; Bhardwaj, B. B. Epidural Bupivacaine Combined With Dexmedetomidine or Clonidine in Infraumbilical Surgeries: A Comparative Evaluation. Int J Res Med Sci 2017, 3, 3254-3261.