A. Y. El Gamal, M. M. Atia, T. El Sayed, M. I. Abou-Zaid, and M. R. Tohamy, “Antiviral activity of chitosan nanoparticles for controlling plant-infecting viruses”, S. Afr. J. Sci., vol. 118, no. 1/2, Jan. 2022, doi: 10.17159/sajs.2022/10693.