These subject options entail short courses up to doctoral work.

While completing his doctoral work, he engaged in child study.

He supervised the doctoral work of a dozen students in this time.

He started his doctoral work, but had to return to Gwalior due to family conditions.

The official normal duration of the doctoral work is three years.

Just before finishing his doctoral work there was a fire in the laboratory.

Bers' doctoral work was on the subject of potential theory.

During the time of his doctoral work, he also served as the state folklorist for Pennsylvania.

That's the main thing he's worked on ever since his doctoral work.

"You really want to do your doctoral work in the Egyptian desert?"