albyatei, ameer, امیر, I. Zainalabddeen assaflly, and عیسى. “Theoretical Study of Hydrogen Adsorption on Graphene Nanostructures Functionalized With Nickel for Solid State Hydrogen Storage”. Journal of Education and Science (JES), vol. 30, no. 2, June 2021, pp. 19-32, doi:10.33899/edusj.2020.128376.1112.