  Leptoproduction of nucleons into the backward hemisphere on nuclear targets
is studied at relativistic subasymptotic energies and momenta. The relativistic
internucleon potential is extracted from appropriate photoproduction data.
Different production mechanisms are found to work together and interfere.
Whenever rescattering is kinematically possible, it gives the bulk of the
contribution, except at very high Q^2. Comparison with the existing data at
E=2.4 GeV shows a reasonable agreement.
