Campbell, R.E., S. Roy, T. Curnow, and M. Walter. “Monitoring Methods and Spatial Patterns of European Canker Disease in Commercial Orchards”. New Zealand Plant Protection 69 (January 8, 2016): 213–220. Accessed August 29, 2026. https://www.journal.nzpps.org/index.php/nzpp/article/view/5883.