Reddy, A.C.S., Singh, N., Rao, P.B., Ramachandran, T.R., George, S.K. and Bhumika, N. 2019. Randomized double blind controlled study of ropivacaine versus bupivacaine in combined spinal epidural anesthesia. Anaesthesia, Pain & Intensive Care. (Jan. 2019), 158-161.