Tóth, M., K. Honty, and M. Hevesi. “Fire Blight (Erwinia Amylovora) Susceptibility of Old Hungarian Apple Cultivars”. International Journal of Horticultural Science 11, no. 3 (August 12, 2005): 35–38. Accessed April 21, 2021. https://ojs.lib.unideb.hu/IJHS/article/view/596.