“THE EFFECT OF CIGARETTE SMOKING ON VITAMIN C AND VITAMIN E LEVELS OF GINGIVAL CREVICULAR FLUID”. Journal of Biological Research - Bollettino della Società Italiana di Biologia Sperimentale 75, no. 3-4 (April 30, 1999). Accessed April 17, 2026. https://www.pagepressjournals.org/jbr/article/view/10895.