1. Baker, J. R., 1956: The histochemical recognition of phenols, especially tyrosine. Quart. J. micr. Sci.97.
2. Bald, J. G., 1949: A method for the selective staining of viruses in infected plant tissues. Phytopathology39.
3. Bawden, F. C., 1956: Plant viruses and virus diseases, 3. Aufl., Waltham, Mass.
4. Brandes, J., 1956: �ber das Aussehen und die Verteilung des Tabakmosaik virus im Blattgewebe. Phytopath. Z.26.
5. Brierley, P., und F. F. Smith, 1947: Carnation andGladiolus virus diseases pose serious problems. Florists' Review99.