Benedek, P. “A Review of the Bee Pollination Research on Temperate Zone Crop Plants in the past Decade: Results and the Need of Further Studies”. International Journal of Horticultural Science 8, no. 2 (August 14, 2002): 7–23. Accessed January 31, 2023. https://ojs.lib.unideb.hu/IJHS/article/view/317.