@book{cao_evnin_ohta_2011, 
  title={Intersecting black branes in strong gravitational waves}, 
  abstractNote={We consider intersecting black branes with strong gravitational waves
propagating along their worldvolume in the context of supergravity theories.
Both near-horizon and space-filling gravitational wave modes are included in
our ansatz. The equations of motion (originally, partial differential
equations) are shown to reduce to ordinary differential equations, which
include a Toda-like system. For special arrangements of intersecting black
branes, the Toda-like system becomes integrable, permitting a more thorough
analysis of the gravitational equations of motion.}, 
  author={Cao and Evnin and Ohta}, 
  year={2011}, 
  month={Jun}
  }