Anharmonic effects on thermodynamic properties of a graphene monolayer A. L. C. da Silva, Ladir Cândido, J. N. Teixeira Rabelo, G.-Q. Hai and F. M. Peeters EPL, 107 5 (2014) 56004 Published online: 05 September 2014 DOI: 10.1209/0295-5075/107/56004