Davarynejad, H. G., M. Ansari, T. Szabó, J. Nyéki, and Z. Szabó. “Seasonality of Weather and Phenology of Reproductive Organs of Flower of Sour Cherry Cultivars in Hungarian Climatic Conditions”. International Journal of Horticultural Science 15, no. 1-2 (March 25, 2009): 75–80. Accessed November 28, 2021. https://ojs.lib.unideb.hu/IJHS/article/view/815.