  In the paper published in Phys. Lett. A245} (1998) 31, Barros and Romero
demonstrated that, in the weak-field approximation, solutions to the
Brans-Dicke equations are related to the solutions of General Relativity for
the same matter distributions. In the present work, we enphasize this result
and we extend it to for generalized scalar-tensor theories in which the
parameter $\omega$ is no longer a constant but an arbitrary function of the
(gravitational) scalar field.
