S. A. Rinku, J. S. Afroz, S. M. A. Sadat, P. Barma, and M. H. Kabir, “The association between low serum vitamin D level & periodontal diseases in Bangladeshi population- An observational study”, J. Bangladesh Coll. Phys., vol. 42, no. 4, pp. 363–367, Oct. 2024.