J/Psi and Drell-Yan pair production on nuclear targets
  We estimate the energy losses in the cases of J/Psi and l^+l^- pair production on nuclear targets in terms of effective change of the initial beam energy. Our phenomenological results are in reasonable agreement with Theoretical calculations. 
Ya. A. Berdnikov, M. M. Ryzhinskiy and Yu. M. Shabelski