M. Ashraf and E. M. Perez, “Clinical Efficacy of Piper betle L. Nanoemulgel as an Adjunct to Scaling and Root Planing in Chronic Periodontitis: A Randomized, Double-Blind, Placebo-Controlled Trial”, Eu Herb Ina, vol. 6, no. 1, pp. 110-117, Jun. 2026.