Benedek, P., J. Nyéki, M. Soltész, Z. Erdős, I. Skola, T. Szabó, I. Amtmann, et al. 2000. “The Effect of the Limitation of Insect Pollination Period on the Fruit Set and Yield of Temperate-Zone Fruit Tree Species”. International Journal of Horticultural Science 6 (1): 90-95. https://doi.org/10.31421/IJHS/6/1/76.