However, no further work was ever done by the company.

And further work is needed on the political front too.

In any case, no further work along this line is known to have been done.

There are a number of areas where further work would be most important.

We feel further work should be done in that area.

All of these are correct even though some things may still need further work.

After 1992 little further work was done on the project for nearly a decade.

However, further work is needed to be certain of relationships.

In my job, either of the above would almost certainly lead to me not being offered any further work.

Further work needed to be done in 1845, 1861, 1863, 1881 and 1883.