Prabhahar.C.S1, Tintu.C2. “Comparison of Vitamin D Levels in Serum and Severity of Periodontal Parameters in Post Menopausal Women With and Without Chronic Periodontitis A Comparative Study”. International Journal of Medical Science in Clinical Research and Review, vol. 6, no. 04, July 2023, pp. Page: 759-775, https://ijmscrr.in/index.php/ijmscrr/article/view/587.