Honty, K., M. Hevesi, M. Göndör, G. Tóth M., V. Bács-Várkuti, and A. Ferenczy. “Susceptibility of Some Traditional Pear Cultivars of Hungarian and Foreign Origin to the Pathogenic Bacterium Erwinia Amylovora”. International Journal of Horticultural Science 10, no. 3 (August 13, 2004): 41–45. Accessed August 6, 2021. https://ojs.lib.unideb.hu/IJHS/article/view/506.