Chaudhary, A.K., Singh, D., Bogra, J.S., Saxena, S., Chandra, G., Bhusan, S. and Singh, P.K. 2019. Thoracic epidural for post-thoracotomy and thoracomyoplasty pain: a comparative study of three concentrations of fentanyl with plain ropivacaine. Anaesthesia, Pain & Intensive Care. (Jan. 2019), 22-27.