1. : Seronegative Polyarthritis. Amsterdam, North Holland Publishing, 1976
2. : Psoriatic arthritis. In, Textbook of Rheumatology. Edited by , , . Philadelphia, WB Saunders, 1981
3. : Psoriatic arthritis: further epidemiologic and genetic considerations. In, Psoriatic Arthritis. Edited by . Orlando, Grune & Stratton, 1985