V. SIVASANKARI M.D, C.B. THARANI M.D, and S.GOBINATHAN M.D., DM, “A Clinical Evaluation Of Therapeutic Drug Monitoring Of Phenytoin In Epileptic Patients In A Tertiary Care Teaching Hospital, Chennai, Tamilnadu: A Randomized, Open Label Comparative Study”, ijpbs, vol. 3, no. 2, pp. 271–280, Jun. 2012.