SESTRAS, A. F., R. E. SESTRAS, A. BARBOS, and M. MILITARU. “The Differences Among Pear Genotypes to Fire Blight (Erwinia Amylovora) Attack, Based on Observations of Natural Infection”. Notulae Botanicae Horti Agrobotanici Cluj-Napoca, vol. 36, no. 2, Dec. 2008, pp. 97-103, doi:10.15835/nbha36277.