Campbell, Rebecca, Amandine Touron, and Monika Walter. “Organic and Inorganic Nitrogen Effects on Spore Production and Mycelial Growth of Neonectria Ditissima in Vitro”. New Zealand Plant Protection 71 (July 30, 2018): 354. Accessed November 15, 2018. http://journal.nzpps.org/index.php/nzpp/article/view/214.