Classification and Ordination: Symposium on advances in vegetation science, Nijmegen, The Netherlands, May 1979

Theory and models in vegetation science: Proceedings of Symposium, Uppsala, July 8–13, 1985

Plant Species and Plant Communities: Proceedings of the International Symposium held at Nijmegen, November 11–12, 1976 in honour of Professor Dr. Victor Westhoff on the occasion of his sixtieth birthday

Data-processing in phytosociology: Report on the activities of the Working Group for data-processing in phytosociology of the International society for vegetation science, 1969–1978

Temporal and spatial patterns of vegetation dynamics