Holb, I. “Apple Powdery Mildew Caused by Podosphaera Leucotricha: Some Aspects of Biology”. International Journal of Horticultural Science 19, no. 3-4 (July 25, 2013): 19–23. Accessed July 18, 2024. https://ojs.lib.unideb.hu/IJHS/article/view/1096.