  We discuss a purely variational approach to the study of a wide class of
second order nonhomogeneous dissipative hyperbolic PDEs. Precisely, we focus on
the wave-like equations that present also a nonzero source term and a
first-order-in-time linear term. The paper carries on the research program
initiated in (Serra&Tilli'12), and developed in (Serra&Tilli'16),
(Tentarelli&Tilli '18), on the De Giorgi approach to hyperbolic equations.
