Yassin, Heba N. “Comparison of Immunoglobulin IgA Level in the Stimulated Saliva of Caries-Free and Caries-Active Children Aged 7-10 Years ”. Journal of Baghdad College of Dentistry, vol. 28, no. 3, Sept. 2016, pp. 155-8, https://doi.org/10.12816/0031124.