1. Agrios, G.N. (1997) Plant Pathology, Fourth Edition, Academic Press, San Diego and London.
2. Allen, D.J., Lenné, J.M. and Waller, J.M. (1999) Pathogen biodiversity: Its nature, characterization and consequences, in D. Wood and J.M. Lenné (eds), Agrobiodiversity: Characterization, utilization and management, CABI Publishing, Wallingford, pp. 123–153.
3. Anonymous (1994) European patent application, Fungus resistant plants, European Patent Office, Bulletin 94/51 (date of publication: 21.12.1994; publication number: 0 629 343 A2), Paris.
4. Anonymous (1995) Showcase for world-beating technology, Grower 124, 9.
5. Bannerot, H. (1980) Screening wild lettuce for Bremia resistance, in Proceedings Eucarpia Meeting on Leafy Vegetables, Littlehampton (UK), pp. 104–105.