We discuss semi-inclusive eA-->e'hX processes in which the hadron h is
emitted backward in the rest frame of the target nucleus. The purpose
of our analysis is the comparison of two approaches based on differen
t descriptions of nuclear structure at short interparticle distance. T
he first one uses nucleonic degrees of freedom and a nuclear spectral
function obtained from a microscopic many-body calculation whereas in
the second one the relativistic invariant phase-space volume available
to a quark in a nucleus is computed, taking into account nucleon-nucl
eon correlations. The calculated proton and pi-meson spectra are compa
red to the data taken at SLAC using 14.5 GeV e(+) and e(-) scattering
off CO.