Three electron beams from a laser-plasma wakefield accelerator and the energy apportioning question. - Yang, X.; Brunetti, E.; Gil, D. Reboredo; Welsh, G. H.; Li, F. Y.; Cipiccia, S.; Ersfeld, B.; Grant, D. W.; Grant, P. A.; Islam, M. R.; Tooley, M. P.; Vieux, G.; et al. (Scientific Reports, 2017)