Ladányi, M., Sz. Persely, T. Szabó, M. Soltész, J. Nyéki, and Z. Szabó. “The Application of A HEAT SUM MODEL for the Budburst of Sour Cherry Varieties Grown at Újfehértó”. International Journal of Horticultural Science 15, no. 4 (September 2, 2009): 105-112. Accessed August 15, 2020. https://ojs.lib.unideb.hu/IJHS/article/view/851.