Szabó, Z., et al. “Utilisation of Data Raised in Blooming Phenology of Fruit Trees for the Choice of Pollinisers of Plum and Apricot Varieties”. International Journal of Horticultural Science, vol. 10, no. 1, Mar. 2004, pp. 35-41., https://doi.org/10.31421/IJHS/10/1/436.