Narang, R., L. Mittal, Y. K. Gupta, .-. Roseka, and R. Verma. “Salivary Biomarkers for Periodontal Diseases-A Review”. Bangladesh Journal of Medical Science, vol. 12, no. 3, June 2013, pp. 244-9, doi:10.3329/bjms.v12i3.15405.