1. The role of parasites in plant populations and communities;Burdon,1994
2. Soil-borne diseases of Sitka spruce seedlings in a forest nursery;Buxton;Transactions of the British Mycological Society,1962
3. Soil pathogens and spatial patterns of seedling mortality in a temperate tree;Packer;Nature,2000
4. Salt, G. A. (1964–67) Pathology experiments on Sitka spruce seedlings. Report on Forestry Research, London 1963: 83–87, 1964: 89–95, 1966: 104–108.
5. van der Plaats-Niterink, A. J. (1981) Monograph of the genus Pythium. Studies in Mycology 21: 1–242.