Sokollik, T., Paasch-Colberg, T., Gorling, K., Eichmann, U., Schnürer, M., Steinke, S., Nickles, P. V., Andreev, A., & Sandner, W. (2010). Laser-driven ion acceleration using isolated mass-limited spheres. New Journal of Physics, 12:. doi:10.1088/1367-2630/12/11/113013.