G. Yadav, C. S. Pradhan, S. K. Gupta, G. Jain, S. Khuba, and D. K. Singh, “Comparison of sedative effi cacy of epidural bupivacaine 0.5% with lignocaine 2% plus adrenaline by measuring BIS guided propofol requirement in gynaecological surgery”, apic, pp. 13-17, Feb. 2019.