Brillouin light scattering characterization of the surface acoustic wave velocity in sp2 allotropes thin filmsE. Salas, R. J. Jiménez-Riobóo, A. de Andrés and C. PrietoEur. Phys. J. B, 75 2 (2010) 151-155DOI: https://doi.org/10.1140/epjb/e2010-00076-7