Hard Exclusive QCD Processes at the Linear Collider
  The next generation of $e^+e^-$ colliders will offer a possibility of clean testing of QCD dynamics. Recent progress in the theoretical description of exclusive processes permits for many of them a consistent use of the perturbative QCD methods.   We find that already on the basis of Born approximation, the exclusive diffractive production of two $\rho$ mesons from virtual photons at very high energies should be measurable at the linear collider (LC). 
B. Pire, L. Szymanowski and S. Wallon