Földesi, Rita, and István Medgyessy. “Composition and Role of Hoverfly (Diptera: Syrphidae) Communities in an Organic Apple Orchard”. Acta Agraria Debreceniensis, no. 36 (November 2, 2009): 57–61. Accessed April 30, 2024. https://ojs.lib.unideb.hu/actaagrar/article/view/2793.