Dr. Nitesh Anand. “COMPARATIVE ESTIMATION OF LEVEL OF TNF- α IN GINGIVAL CREVICULAR FLUID AND BLOOD SERUM IN PATIENT WITH CHRONIC PERIODONTITIS BEFORE AND AFTER SCALING AND ROOT PLANING: A BIOCHEMICAL STUDY”. International Journal of Medical Science And Diagnosis Research, Vol. 3, no. 10, Oct. 2019, https://www.ijmsdr.com/index.php/ijmsdr/article/view/501.