‘Surveys in the EU for Clavibacter michiganensis spp. sepodonicus and Ralstonia solanacearum, 2004/2005 season’, rapport de la Direction F – Food and Veterinary Office, page 2 (§2).
‘Surveys in the EU for Clavibacter michiganensis spp. sepodonicus and Ralstonia solanacearum, 2004/2005 season’, verslag door directoraat F – Food and Veterinary Office, pagina 2 (§2).