Mahmoud, E. A., O. G. Shaker, N. Yussif, and D. M. Ghalwash,  "Effect of Locally Delivered Melatonin as an Adjunct to Nonsurgical Therapy on GCF Antioxidant Capacity and MMP-9 in Stage II Periodontitis Patients: A Randomized Controlled Clinical Tria",  International Journal of Dentistry, vol. 2021, 2021.