Ladányi, M., S. 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, vol. 15, no. 4, Sept. 2009, pp. 105-112., doi:10.31421/IJHS/15/4/851.