Azargoun, R, and S Asri-Rezaei. “Serum Ascorbic Acid and Calcidiol Status in Dogs With Graded Periodontitis”. Journal of the Hellenic Veterinary Medical Society 75, no. 4 (January 15, 2025): 8197–8202. Accessed January 21, 2025. https://ejournals.epublishing.ekt.gr/index.php/jhvms/article/view/35300.