Hydrogen adsorption on graphene: a first principles studyV. V. Ivanovskaya, A. Zobelli, D. Teillet-Billy, N. Rougeau, V. Sidis and P. R. BriddonEur. Phys. J. B, 76 3 (2010) 481-486DOI: https://doi.org/10.1140/epjb/e2010-00238-7