R. SUDAR CODI, N. SELVARAJAN, K. MANIMEKALAI, and KARTIK J. SALWE, “EFFECT OF ORAL CLONIDINE PREMEDICATION ON THE DURATION OF ANALGESIA PRODUCED BY SPINAL BUPIVACAINE”., ijpbs, vol. 4, no. 3, pp. 1017–1024, Sep. 2013.