%0 Journal Article %J Phys. Rev. Lett. %D 2015 %T Synergistic Laser-Wakefield and Direct-Laser Acceleration in the Plasma-Bubble Regime %A Xi Zhang %A Vladimir N. Khudik %A Gennady Shvets %B Phys. Rev. Lett. %V 114 %G eng %U http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.114.184801 %N 184801