Ponderomotive ion acceleration in dense plasmas at super-high laser intensitiesN. Naumova, T. Schlegel, V. T. Tikhonchuk, C. Labaune, I. V. Sokolov and G. MourouEur. Phys. J. D, 55 2 (2009) 393-398DOI: https://doi.org/10.1140/epjd/e2009-00250-2