S. V. Rijsoort

Negative beliefs of spider phobics: A psychometric evaluation of the spider phobia beliefs questionnaire

A. Arntz, E. Lavy, G. V. D. Berg, 1993 .

The Penn State Worry Questionnaire and the Worry Domains Questionnaire: structure, reliability and validity

Geert Vervaeke, P. Emmelkamp, G. Vervaeke, 1999 .

Assessment of worry and OCD: how are they related?

P. Emmelkamp, G. Vervaeke, S. V. Rijsoort, 2001 .