1. Baumm, L.H., 1985. Praxisorientierte Untersuchungen zum Auftreten der Feuerbrandkrankheit (Erwinia amylovora (Burrill) Winslow et al.) im Obstanbaugebiet an der Niederelbe. Ph.D. Thesis, University of Hamburg, Germany. 160 pp.
2. Bech-Andersen, J., 1973. The relationship between fireblight in fruit trees and hawthorn in Denmark. 2nd International Congress of Plant Pathology, Minneapolis. Abstract of papers, No. 0749.
3. Billing, E., 1981. Hawthorn as a source of the fireblight bacterium for pear, apple and ornamental hosts. In: Thresh, J.M. (Ed.), Pests, pathogens and vegetation. The role of weeds and wild plants in the ecology of crop pests and diseases. Pitman, Boston, etc., p. 121–130.
4. De Wael, L., 1988. De honingbij als mogelijke vector vanErwinia amylovora (Burr.) Winslow et al. Ph.D. Thesis, Agricultural University, Belgium. 190 pp.
5. Glasscock, H.H., 1971. Fire blight epidemic among Kentish apple orchards in 1969. Annals of Applied Biology 69: 137–145.