Horčinová Sedláčková, V., M. Hulin, and J. Brindza. “Comparison of Old and Landraces Varieties of the Apple Tree (Malus Domestica Borkh) in the Variability of Some Morphological Characters of Leaves and Flowers”. Agrobiodiversity for Improving Nutrition, Health and Life Quality, no. 4, Nov. 2020, https://agrobiodiversity.uniag.sk/scientificpapers/article/view/328.