1. 1990. In: editors. Imagery and affect: big question, little answers?Imagery-current developments. London: Routledge. p 247-267.
2. 1994. The nature, functions, and origins of worry. In: editors. Worrying: perspectives on theory, assessment and treatment. Chichester: John Wiley and Sons. p 5-33.
3. 1993. Worry: thought suppression of emotional processing. In: editor. Vigilance and avoidance. Toronto: Hogrefe and Huber Publishers. p 101-118.
4. The effect of worry on cardiovascular response to phobic imagery
5. The nature of worry in generalized anxiety disorder: A predominance of thought activity