1. : Oral presentation at Myopain '92. Kopenhagen, Denmark, 2nd World Congress on Myofascial Pain and Fibromyalgia, 17–20 August 1992.
2. The american college of rheumatology 1990 criteria for the classification of fibromyalgia
3. The american rheumatism association 1987 revised criteria for the classification of rheumatoid arthritis
4. , , et al: Fitness training and biofeedback in fibromyalgia patients: a randomized controlled trial. Budapest, Hungary, Abstracts of the XIIth European Congress of Rheumatology, 30 June to 6 July 1991.
5. , : Sociale netwerk-strategieen in de sociale psychiatrie. Houten/Antwerpen, Bohn Stafleu van Loghum, 1990.