I. Mohmad Nasir, N. Ameram, A. Ali, M. H. Mohamad Amini, N. I. Ibrahim, and S. R. Hassan, “²⁹Si Solid-State NMR Spectroscopy of Guanine-Modified Rice Husk Silica (RHACGua)”, Malays J Bioeng Tech, vol. 2, no. 2, pp. 54–59, Jun. 2025.