  Effective Lagrangians suitable for a relativistic Hartree-Fock description of
nuclear systems are presented. They include the 4 effective mesons $\sigma,
\omega, \rho$ and $\pi$ with density-dependent meson-nucleon couplings. The
criteria for determining the model parameters are the reproduction of the
binding energies in a number of selected nuclei, and the bulk properties of
nuclear matter (saturation point, compression modulus, symmetry energy). An
excellent description of nuclear binding energies and radii is achieved for a
range of nuclei encompassing light and heavy systems. The predictions of the
present approach compare favorably with those of existing relativistic mean
field models, with the advantage of incorporating the effects of pion-nucleon
coupling.
