Studies to use for "Causes of Stress" and "Measuring Stress"

The number of studies is one of the more daunting aspects of A2 psychology.

Some areas, though, allow you to use the same study for different areas, which can make quite a big difference to you. A couple less studies gives you more time to revise the rest, so it could be pretty useful. 

One area you can do this for is Stress. The causes of stress (work, hassles and lack of control)  studies obviously measure stress, so you can use these studies and their measuring technique for the second part of the subtopic.

Here's the studies I use:

Johansson (work as well as combined approach)
Kanner et al (hassles/life events as well as self-report measures)
Geer and Maisel (lack of control and physiological measures)