On the absolute continuity of distributions for occupation times

Some results about the structure of distributions for occupation times
$$ \tau=\int_T\mathbb I_G(t,\xi(t))\,dt, $$
where $G$ is a subset of $T\times\mathbb R^1$ and $\xi$ is a Brownian motion or a process of diffusion type, are proved. Bibliography: 10 titles.