@article {5078, title = {Spectroscopic measurement of interlayer screening in multilayer epitaxial graphene}, journal = {Physical Review Letters}, year = {2010}, doi = {10.1103/PhysRevLett.104.136802}, author = {Dong Sun and Charles Divin and Claire Berger and Walt A. De Heer and Phillip N. First and Theodore B. Norris} }