1. An expert system for diagnosis of post-harvest potato diseases;Adams;EPPO Bulletin,1990
2. Comparison of immunological methods for detection of Erwinia carotovora subsp. atroseptica using monoclonal and polyclonal antibodies;Alarcon,1994
3. Council Directive 77/93/EEC of 21 December 1976 on protective measures against the introduction into the Member States of organisms harmful to plants or plant products;Anonymous;Official Journal of the European Communities,1977
4. Commission Decision of 21 August 1980 authorising the Member States to provide for derogations from certain provisions of Council Directive 77/93/EEC, in respect of potato breeding material;Anonymous;Official Journal of the European Communities,1980
5. Certification scheme: Schema de certification. Virus-free or virus-tested fruit trees and rootstocks. Part I. Basic scheme and its elaboration;Anonymous;EPPO Bulletin,1991