On the electrodisintegration of the deuteron in the Bethe-Salpeter   formalism
  The (ed -> enp) process in the frame of the Bethe-Salpeter approach with a separable kernel of the Nucleon-Nucleon (NN) interaction was considered. This conception keeps the covariance of description of the process. Special attention was devoted to a contribution of the D-states of the deuteron in the cross section of the electrodisintegration. It was shown that the spectator particle (neutron) plays an important role. The factorization of a cross section of this reaction in the impulse approximation was checked by analytical and numerical calculations. 
S.G. Bondarenko, V.V. Burov, A.A. Goy, E.P. Rogochaya