  The mechanism of propagation of hadronic states in the medium is a key point
for understanding particle-nucleus and nucleus-nucleus scattering at high
energies. We have investigated the propagation of a baryon in the exclusive
process A(e,e'p)B in few-nucleon systems using realistic nuclear wave functions
and Glauber multiple scattering theory both in its original form and within a
generalized eikonal approximation. New results for the processes 3He(e,e'p)2H
and 4He(e,e'p)3H are compared with data recently obtained at the Thomas
Jefferson Laboratory (JLAB).
