  The electronic transport properties of heavy-fermion systems were calculated
based on a semiphenomenological approach to the lattice non-crossing
approximation in the limit of infinite local correlations augmented by
crystal-field effects. Within the scope of this calculation using the
linearized Boltzmann theory in the relaxation time approximation the
qualitative features of the temperature-dependent resistivity, the
magnetoresistivity and the thermoelectric power can be successfully reproduced;
this is exemplified by a comparison with experimental results on CeCu_2Si_2.
