G. Tóth, M., Sz. Kovács, and Zs. D. Rozsnyay. “Scab Resistance in Malus Sp. Progenies - Inheritance and Resistance Stability”. International Journal of Horticultural Science 9, no. 1 (April 14, 2003): 9–15. Accessed June 20, 2021. https://ojs.lib.unideb.hu/IJHS/article/view/368.