Udonquak, M.M., Kalu, Q.N. and Eshiet, A.I. 2017. Pethidine and bupivacaine spinal anaesthesia: a comparative evaluation of postoperative complications and recovery profile. International Journal of Research in Medical Sciences. 5, 6 (May 2017), 2490–2496. DOI:https://doi.org/10.18203/2320-6012.ijrms20172434.