The research for the book extended over a 20-year period.

Other new research extends the controversy beyond those students who go on to college.

Further research, she said, could extend the known range of early literacy.

Meara's interest and research in the language of counseling extended beyond that project, however.

The research and writing of that book extended over twenty-four years.

His research extends from 1890 to the present and covers many genres.

It currently only runs on the newer versions of Windows because that's all that my research has extended to so far.

However, recent research has extended this effect to virtual communication.

Later research to be considered in chapter 9 extends these basic ideas.

My brief research didn't extend to the manner of her death.