“Evaluation of Folic Acid Level in Serum of Smokers and Non Smokers Patients With Periodontal Disease: A Case-Control Study”. Mustansiria Dental Journal 20, no. 2 (December 30, 2024): 233–243. Accessed May 15, 2025. https://mdj.uomustansiriyah.edu.iq/index.php/mdj/article/view/1175.