P, Biju, S, Dileep, John, John T, M J, Joice Varghese, AND G, Divya. " Comparison of Efficacy of Intra Operative Periarticular Injection With That of Post Operative Epidural Analgesia for Pain Control Following Unilateral Total Knee Arthroplasty Under Spinal Anesthesia — A Prospective Randomized Controlled Trial" Kerala Journal of Orthopaedics [Online], Volume 30 Number 1-2 (9 January 2018)