Szalai, Z. “Differences of Pollen and Pollenkitt Attractiveness of Some Cultivated and Ornamental Apples for Honeybees”. International Journal of Horticultural Science 6, no. 3 (June 6, 2000): 145–150. Accessed November 22, 2024. https://ojs.lib.unideb.hu/IJHS/article/view/130.