1. Ahrens U (1994) Charakterisierung von phytopathogenen Mykoplasmen holziger Pflanzen und Detektion der Erreger durch in-vitro Amplifikation von ribosomaler DNA. Ph.D. Thesis, University of Heidelberg
2. Ahrens U and Seemüller E (1992) Detection of DNA of plant pathogenic mycoplasmalike organisms by a polymerase chain reaction that amplifies a sequence of the 16S rRNA gene. Phytopatholoy 82: 828–832
3. Alma A, Arzone A and Bosco D (1993) Grapevine MLO transmission by insects. Extended Abstracts 11th Meeting ICVG, Montreux, Switzerland, 6–9 Sept. 1993, 84–85
4. Bianco PA, Davis RE, Prince JP, Lee IM, Gundersen DE, Fortusini A and Belli G (1993) Double and single infections by aster yellows and elm yellows MLOs in grapevines with symptoms characteristic of flavescence dorée. Riv. Pat. Veg., S.V. 3: 69–82
5. Caudwell A (1989) Recent development and progress in epidemiology and characterization of grapevine yellows disease. Proc. 9th Meet. ICVG, Sept. 6–11 1987, Kiryat Anavim, Israel: 173–184