Refaat, Z., M. E. Saied, A. A. E. O. Naga, S. A. Shaban, H. B. Hassan, M. R. Shehata, and F. Y. E. Kady,  "Efficient CO2 methanation using nickel nanoparticles supported mesoporous carbon nitride catalysts",  Scientific Reports, vol. 13, no. 1: Nature Publishing Group UK London, pp. 4855, 2023.