Sáez, X., Soba, A., Sánchez, E., Kleiber, R., Castejón, F., & Cela, J. (2011). Improvements of the particle-in-cell code EUTERPE for petascaling machines. Computer Physics Communications, 182(9), 2047-2051. doi:10.1016/j.cpc.2010.12.038.