  Semi-inclusive deep inelastic lepton scattering off few-nucleon systems is
investigated assuming that virtual boson absorption occurs on a hadronic
cluster which can be either a two-nucleon correlated pair or a six-quark bag.
In both cases the relevance of nuclear effects on forward and backward nucleon
emissions is illustrated and the differences expected in the energy
distribution of the emitted nucleons are analyzed both at x>1 and x<1.
