@article{article3464ef03, title = {Energy conservation in approximated solutions of multibeam scattering problems}, author = {Morelhão, Sérgio Luiz and Avanci, Luis Humberto and Kycia, S}, year = {2005}, doi = {10.1016/j.nimb.2005.03.290}, journal = {Nuclear Instruments & Methods in Physics Research Section B-Beam Interactions with Materials and Atoms} }